#divisors — Public Fediverse posts

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

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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

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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
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
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

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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

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