398045007380

素因数分解:

$2^2\times 5^1\times {\mathrm{77239}}^1\times {\mathrm{257671}}^1$

素因数の和:334919

約数の個数: 24

約数和(自身を含む): 835908581760

約数和(自身を除く): 437863574380

約数列:

[1, 2, 4, 5, 10, 20, 77239, 154478, 257671, 308956, 386195, 515342, 772390, 1030684, 1288355, 1544780, 2576710, 5153420, 19902250369, 39804500738, 79609001476, 99511251845, 199022503690, 398045007380]

約数ペア:

[(1, 398045007380), (2, 199022503690), (4, 99511251845), (5, 79609001476), (10, 39804500738), (20, 19902250369), (77239, 5153420), (154478, 2576710), (257671, 1544780), (308956, 1288355), (386195, 1030684), (515342, 772390)]