21285685840

素因数分解:

$2^4\times 5^1\times {\mathrm{2113}}^1\times {\mathrm{125921}}^1$

素因数の和:128047

約数の個数: 40

約数和(自身を含む): 49513034088

約数和(自身を除く): 28227348248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2113, 4226, 8452, 10565, 16904, 21130, 33808, 42260, 84520, 125921, 169040, 251842, 503684, 629605, 1007368, 1259210, 2014736, 2518420, 5036840, 10073680, 266071073, 532142146, 1064284292, 1330355365, 2128568584, 2660710730, 4257137168, 5321421460, 10642842920, 21285685840]

約数ペア:

[(1, 21285685840), (2, 10642842920), (4, 5321421460), (5, 4257137168), (8, 2660710730), (10, 2128568584), (16, 1330355365), (20, 1064284292), (40, 532142146), (80, 266071073), (2113, 10073680), (4226, 5036840), (8452, 2518420), (10565, 2014736), (16904, 1259210), (21130, 1007368), (33808, 629605), (42260, 503684), (84520, 251842), (125921, 169040)]