#divisors — Public Fediverse posts

One day, one decomposition
A276655: Numbers j such that Sum_{p|j} 0.p is an integer where p ranges over the prime divisors of j

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A276655.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A276655.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A276655.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #primes #PrimeNumbers #divisors #graph #threejs #webGL

One day, one decomposition
A274357: Numbers n such that n and n+1 both have 8 divisors

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A274357.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A274357.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A274357.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #divisors #graph #threejs #webGL

One day, one decomposition
A267892: Numbers with 9 odd divisors

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A267892.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A267892.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A267892.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #odd #divisors #graph #threejs #webGL

One day, one decomposition
A235034: Numbers whose prime divisors, when multiplied together without carry-bits (as encodings of GF(2)[X]-polynomials, with A048720), produce the original number; numbers for which A234741(n) = n

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A235034.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A235034.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #prime #divisors #polynomials #graph #threejs #webGL

One day, one decomposition
A230577: Positive integers that have exactly 6 odd divisors

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A230577.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A230577.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #odd #divisors #graph #threejs #webGL

One day, one decomposition
A132999: Imperfect numbers: Not equal to sum of proper divisors

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Imperfect_numbers.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/Imperfect_numbers.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #imperfect #numbers #sum #proper #divisors #graph #threejs #webGL

One day, one decomposition
A123193: Numbers with number of divisors equal to a Fibonacci number

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A123193.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A123193.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #divisors #Fibonacci #graph #threejs #webGL

One day, one decomposition
A122094: Prime divisors of Mersenne numbers. Primes p such that the multiplicative order of 2 modulo p is prime.

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A122094.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A122094.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #prime #divisors #Mersenne #numbers #PrimeNumbers #graph #threejs #webGL

One day, one decomposition
A113502: A number n is included if at least one of its divisors > 1 is a triangular number (i.e., is of the form m(m+1)/2, m >= 2)

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A113502.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A113502.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #triangular #numbers #divisors #graph #threejs #webGL

One day, one decomposition
A112886: Positive integers that have no triangular divisors > 1

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A112886.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A112886.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #triangular #numbers #divisors #graph #threejs #webGL

One day, one decomposition
A103664: Primes p such that the number of divisors of p-1 is less than the number of divisors of p+1

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A103664.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A103664.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #numbers #primes #PrimeNumbers #divisors #graph #threejs #webGL

One day, one decomposition
A095050: Numbers such that all ten digits are needed to write all positive divisors in decimal representation

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A095050.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A095050.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #numbers #digits #divisors #decimal #representation #graph #threejs #webGL

One day, one decomposition
A085844: Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A085844.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A085844.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #numbers #permutation #digits #sum #proper #divisors #graph #threejs #webGL

One day, one decomposition
A083207: Zumkeller or integer-perfect numbers: numbers n whose divisors can be partitioned into two disjoint sets with equal sum

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Zumkeller_numbers.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/Zumkeller_numbers.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #numbers #divisors #partitioned #disjoint #sets #equal #sum #graph #threejs #webGL

One day, one decomposition
A080683: 23-smooth numbers: numbers whose prime divisors are all <= 23

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/23-smooth_numbers.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/23-smooth_numbers.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #smooth #numbers #prime #divisors #graph #threejs #webGL

One day, one decomposition
A080681: 17-smooth numbers: numbers whose prime divisors are all <= 17

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A080681.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A080681.html

#decompwlj #maths #mathematics #OEIS #javascript #php #3D #smooth #numbers #prime #divisors #graph #threejs #webGL

One day, one decomposition
A080218: Monotonically increasing sequence such that every positive integer n appears if and only if d(n) doesn't (d(n)=number of divisors of n, A000005)

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A080218.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A080218.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #divisors #graph #threejs #webGL

One day, one decomposition
A075592: Numbers n such that number of distinct prime divisors of n is a divisor of n

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A075592.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A075592.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #distinct #prime #divisors #graph #threejs #webGL

One day, one decomposition
A075587: Primes p such that the number of distinct prime divisors of all composite numbers between p and the next prime is 7

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A075587.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A075587.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #primes #primenumbers #divisors #composite #graph #threejs #webGL

One day, one decomposition
A075584: Primes p such that the number of distinct prime divisors of all composite numbers between p and the next prime is 4

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A075584.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A075584.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #primes #primenumbers #divisors #composite #graph #threejs #webGL

One day, one decomposition
A071395: Primitive abundant numbers (abundant numbers all of whose proper divisors are deficient numbers)

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A071395.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A071395.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #primitive #abundant #numbers #proper #divisors #deficient #graph #threejs #webGL

One day, one decomposition
A067889: Primes sandwiched between two numbers having same number of divisors

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A067889.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A067889.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #primes #numbers #divisors #primenumbers #graph #threejs #webGL

One day, one decomposition
A063948: Unitary untouchable numbers: us(x) = n has no solution where us(x) (A063919) is the sum of the proper unitary divisors of x

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Unitary_untouchable_numbers.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/Unitary_untouchable_numbers.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #unitary #untouchable #numbers #proper #divisors #graph #threejs #webGL

One day, one decomposition
A059269: Numbers m for which the number of divisors, tau(m), is divisible by 3

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A059269.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A059269.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #number #divisors #divisible #graph #threejs #webGL

One day, one decomposition
A058972: For a rational number p/q let f(p/q) = sum of aliquot divisors of p+q divided by number of divisors of p+q; sequence gives numbers k such that, starting at k/1 and iterating f, an integer is eventually reached

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A058972.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A058972.html

#decompwlj #maths #mathematics #sequence #OEIS #javascript #php #3D #numbers #aliquot #divisors #integer #graph #threejs #webGL

One day, one decomposition
A006532: Numbers whose sum of divisors is a square

3D graph #threejs #webGL ➡️ https://decompwlj.com/3Dgraph/A006532.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A006532.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #numbers #sum #divisors #square #graph