638856738

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{2730157}}^1$

素因数の和:2730178

約数の個数: 24

約数和(自身を含む): 1490666268

約数和(自身を除く): 851809530

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 2730157, 5460314, 8190471, 16380942, 24571413, 35492041, 49142826, 70984082, 106476123, 212952246, 319428369, 638856738]

約数ペア:

[(1, 638856738), (2, 319428369), (3, 212952246), (6, 106476123), (9, 70984082), (13, 49142826), (18, 35492041), (26, 24571413), (39, 16380942), (78, 8190471), (117, 5460314), (234, 2730157)]