81291640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70079}}^1$

素因数の和:70119

約数の個数: 32

約数和(自身を含む): 189216000

約数和(自身を除く): 107924360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70079, 140158, 280316, 350395, 560632, 700790, 1401580, 2032291, 2803160, 4064582, 8129164, 10161455, 16258328, 20322910, 40645820, 81291640]

約数ペア:

[(1, 81291640), (2, 40645820), (4, 20322910), (5, 16258328), (8, 10161455), (10, 8129164), (20, 4064582), (29, 2803160), (40, 2032291), (58, 1401580), (116, 700790), (145, 560632), (232, 350395), (290, 280316), (580, 140158), (1160, 70079)]