20678180

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6343}}^1$

素因数の和:6515

約数の個数: 24

約数和(自身を含む): 43697472

約数和(自身を除く): 23019292

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6343, 12686, 25372, 31715, 63430, 126860, 1033909, 2067818, 4135636, 5169545, 10339090, 20678180]

約数ペア:

[(1, 20678180), (2, 10339090), (4, 5169545), (5, 4135636), (10, 2067818), (20, 1033909), (163, 126860), (326, 63430), (652, 31715), (815, 25372), (1630, 12686), (3260, 6343)]