81778040

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{14923}}^1$

素因数の和:15071

約数の個数: 32

約数和(自身を含む): 185356080

約数和(自身を除く): 103578040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 5480, 14923, 29846, 59692, 74615, 119384, 149230, 298460, 596920, 2044451, 4088902, 8177804, 10222255, 16355608, 20444510, 40889020, 81778040]

約数ペア:

[(1, 81778040), (2, 40889020), (4, 20444510), (5, 16355608), (8, 10222255), (10, 8177804), (20, 4088902), (40, 2044451), (137, 596920), (274, 298460), (548, 149230), (685, 119384), (1096, 74615), (1370, 59692), (2740, 29846), (5480, 14923)]