638961908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{977}}^1\times {\mathrm{12577}}^1$

素因数の和:13571

約数の個数: 24

約数和(自身を含む): 1205525832

約数和(自身を除く): 566563924

約数列:

[1, 2, 4, 13, 26, 52, 977, 1954, 3908, 12577, 12701, 25154, 25402, 50308, 50804, 163501, 327002, 654004, 12287729, 24575458, 49150916, 159740477, 319480954, 638961908]

約数ペア:

[(1, 638961908), (2, 319480954), (4, 159740477), (13, 49150916), (26, 24575458), (52, 12287729), (977, 654004), (1954, 327002), (3908, 163501), (12577, 50804), (12701, 50308), (25154, 25402)]