20328740

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1571}}^1$

素因数の和:2227

約数の個数: 24

約数和(自身を含む): 42783552

約数和(自身を除く): 22454812

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1571, 2588, 3142, 3235, 6284, 6470, 7855, 12940, 15710, 31420, 1016437, 2032874, 4065748, 5082185, 10164370, 20328740]

約数ペア:

[(1, 20328740), (2, 10164370), (4, 5082185), (5, 4065748), (10, 2032874), (20, 1016437), (647, 31420), (1294, 15710), (1571, 12940), (2588, 7855), (3142, 6470), (3235, 6284)]