640490757

素因数分解:

$3^1\times {\mathrm{37}}^2\times {\mathrm{277}}^1\times {\mathrm{563}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 882425376

約数和(自身を除く): 241934619

約数列:

[1, 3, 37, 111, 277, 563, 831, 1369, 1689, 4107, 10249, 20831, 30747, 62493, 155951, 379213, 467853, 770747, 1137639, 2312241, 5770187, 17310561, 213496919, 640490757]

約数ペア:

[(1, 640490757), (3, 213496919), (37, 17310561), (111, 5770187), (277, 2312241), (563, 1137639), (831, 770747), (1369, 467853), (1689, 379213), (4107, 155951), (10249, 62493), (20831, 30747)]