78331640

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{9281}}^1$

素因数の和:9503

約数の個数: 32

約数和(自身を含む): 177100560

約数和(自身を除く): 98768920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 9281, 18562, 37124, 46405, 74248, 92810, 185620, 371240, 1958291, 3916582, 7833164, 9791455, 15666328, 19582910, 39165820, 78331640]

約数ペア:

[(1, 78331640), (2, 39165820), (4, 19582910), (5, 15666328), (8, 9791455), (10, 7833164), (20, 3916582), (40, 1958291), (211, 371240), (422, 185620), (844, 92810), (1055, 74248), (1688, 46405), (2110, 37124), (4220, 18562), (8440, 9281)]