389997980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{629029}}^1$

素因数の和:629069

約数の個数: 24

約数和(自身を含む): 845416320

約数和(自身を除く): 455418340

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 629029, 1258058, 2516116, 3145145, 6290290, 12580580, 19499899, 38999798, 77999596, 97499495, 194998990, 389997980]

約数ペア:

[(1, 389997980), (2, 194998990), (4, 97499495), (5, 77999596), (10, 38999798), (20, 19499899), (31, 12580580), (62, 6290290), (124, 3145145), (155, 2516116), (310, 1258058), (620, 629029)]