399128260

素因数分解:

$2^2\times 5^1\times {\mathrm{1571}}^1\times {\mathrm{12703}}^1$

素因数の和:14283

約数の個数: 24

約数和(自身を含む): 838768896

約数和(自身を除く): 439640636

約数列:

[1, 2, 4, 5, 10, 20, 1571, 3142, 6284, 7855, 12703, 15710, 25406, 31420, 50812, 63515, 127030, 254060, 19956413, 39912826, 79825652, 99782065, 199564130, 399128260]

約数ペア:

[(1, 399128260), (2, 199564130), (4, 99782065), (5, 79825652), (10, 39912826), (20, 19956413), (1571, 254060), (3142, 127030), (6284, 63515), (7855, 50812), (12703, 31420), (15710, 25406)]