20958040

素因数分解:

$2^3\times 5^1\times {\mathrm{709}}^1\times {\mathrm{739}}^1$

素因数の和:1459

約数の個数: 32

約数和(自身を含む): 47286000

約数和(自身を除く): 26327960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 709, 739, 1418, 1478, 2836, 2956, 3545, 3695, 5672, 5912, 7090, 7390, 14180, 14780, 28360, 29560, 523951, 1047902, 2095804, 2619755, 4191608, 5239510, 10479020, 20958040]

約数ペア:

[(1, 20958040), (2, 10479020), (4, 5239510), (5, 4191608), (8, 2619755), (10, 2095804), (20, 1047902), (40, 523951), (709, 29560), (739, 28360), (1418, 14780), (1478, 14180), (2836, 7390), (2956, 7090), (3545, 5912), (3695, 5672)]