18236400680

素因数分解:

$2^3\times 5^1\times {\mathrm{887}}^1\times {\mathrm{513991}}^1$

素因数の和:514889

約数の個数: 32

約数和(自身を含む): 41078240640

約数和(自身を除く): 22841839960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 887, 1774, 3548, 4435, 7096, 8870, 17740, 35480, 513991, 1027982, 2055964, 2569955, 4111928, 5139910, 10279820, 20559640, 455910017, 911820034, 1823640068, 2279550085, 3647280136, 4559100170, 9118200340, 18236400680]

約数ペア:

[(1, 18236400680), (2, 9118200340), (4, 4559100170), (5, 3647280136), (8, 2279550085), (10, 1823640068), (20, 911820034), (40, 455910017), (887, 20559640), (1774, 10279820), (3548, 5139910), (4435, 4111928), (7096, 2569955), (8870, 2055964), (17740, 1027982), (35480, 513991)]