81581759

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{727}}^1$

素因数の和:815

約数の個数: 32

約数和(自身を含む): 105670656

約数和(自身を除く): 24088897

約数列:

[1, 7, 17, 23, 41, 119, 161, 287, 391, 697, 727, 943, 2737, 4879, 5089, 6601, 12359, 16031, 16721, 29807, 86513, 112217, 117047, 208649, 284257, 506719, 685561, 1989799, 3547033, 4798927, 11654537, 81581759]

約数ペア:

[(1, 81581759), (7, 11654537), (17, 4798927), (23, 3547033), (41, 1989799), (119, 685561), (161, 506719), (287, 284257), (391, 208649), (697, 117047), (727, 112217), (943, 86513), (2737, 29807), (4879, 16721), (5089, 16031), (6601, 12359)]