21987160

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42283}}^1$

素因数の和:42307

約数の個数: 32

約数和(自身を含む): 53277840

約数和(自身を除く): 31290680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42283, 84566, 169132, 211415, 338264, 422830, 549679, 845660, 1099358, 1691320, 2198716, 2748395, 4397432, 5496790, 10993580, 21987160]

約数ペア:

[(1, 21987160), (2, 10993580), (4, 5496790), (5, 4397432), (8, 2748395), (10, 2198716), (13, 1691320), (20, 1099358), (26, 845660), (40, 549679), (52, 422830), (65, 338264), (104, 211415), (130, 169132), (260, 84566), (520, 42283)]