18813940

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{17749}}^1$

素因数の和:17811

約数の個数: 24

約数和(自身を含む): 40257000

約数和(自身を除く): 21443060

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 17749, 35498, 70996, 88745, 177490, 354980, 940697, 1881394, 3762788, 4703485, 9406970, 18813940]

約数ペア:

[(1, 18813940), (2, 9406970), (4, 4703485), (5, 3762788), (10, 1881394), (20, 940697), (53, 354980), (106, 177490), (212, 88745), (265, 70996), (530, 35498), (1060, 17749)]