20782840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2351}}^1$

素因数の和:2392

約数の個数: 64

約数和(自身を含む): 53343360

約数和(自身を除く): 32560520

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2351, 4420, 4702, 8840, 9404, 11755, 18808, 23510, 30563, 39967, 47020, 61126, 79934, 94040, 122252, 152815, 159868, 199835, 244504, 305630, 319736, 399670, 519571, 611260, 799340, 1039142, 1222520, 1598680, 2078284, 2597855, 4156568, 5195710, 10391420, 20782840]

約数ペア:

[(1, 20782840), (2, 10391420), (4, 5195710), (5, 4156568), (8, 2597855), (10, 2078284), (13, 1598680), (17, 1222520), (20, 1039142), (26, 799340), (34, 611260), (40, 519571), (52, 399670), (65, 319736), (68, 305630), (85, 244504), (104, 199835), (130, 159868), (136, 152815), (170, 122252), (221, 94040), (260, 79934), (340, 61126), (442, 47020), (520, 39967), (680, 30563), (884, 23510), (1105, 18808), (1768, 11755), (2210, 9404), (2351, 8840), (4420, 4702)]