64699640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39451}}^1$

素因数の和:39503

約数の個数: 32

約数和(自身を含む): 149128560

約数和(自身を除く): 84428920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 39451, 78902, 157804, 197255, 315608, 394510, 789020, 1578040, 1617491, 3234982, 6469964, 8087455, 12939928, 16174910, 32349820, 64699640]

約数ペア:

[(1, 64699640), (2, 32349820), (4, 16174910), (5, 12939928), (8, 8087455), (10, 6469964), (20, 3234982), (40, 1617491), (41, 1578040), (82, 789020), (164, 394510), (205, 315608), (328, 197255), (410, 157804), (820, 78902), (1640, 39451)]