64681640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{18169}}^1$

素因数の和:18269

約数の個数: 32

約数和(自身を含む): 147177000

約数和(自身を除く): 82495360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 18169, 36338, 72676, 90845, 145352, 181690, 363380, 726760, 1617041, 3234082, 6468164, 8085205, 12936328, 16170410, 32340820, 64681640]

約数ペア:

[(1, 64681640), (2, 32340820), (4, 16170410), (5, 12936328), (8, 8085205), (10, 6468164), (20, 3234082), (40, 1617041), (89, 726760), (178, 363380), (356, 181690), (445, 145352), (712, 90845), (890, 72676), (1780, 36338), (3560, 18169)]