21331780

素因数分解:

$2^2\times 5^1\times {\mathrm{359}}^1\times {\mathrm{2971}}^1$

素因数の和:3339

約数の個数: 24

約数和(自身を含む): 44936640

約数和(自身を除く): 23604860

約数列:

[1, 2, 4, 5, 10, 20, 359, 718, 1436, 1795, 2971, 3590, 5942, 7180, 11884, 14855, 29710, 59420, 1066589, 2133178, 4266356, 5332945, 10665890, 21331780]

約数ペア:

[(1, 21331780), (2, 10665890), (4, 5332945), (5, 4266356), (10, 2133178), (20, 1066589), (359, 59420), (718, 29710), (1436, 14855), (1795, 11884), (2971, 7180), (3590, 5942)]