639968492

素因数分解:

$2^2\times {\mathrm{557}}^1\times {\mathrm{287239}}^1$

素因数の和:287800

約数の個数: 12

約数和(自身を含む): 1121959440

約数和(自身を除く): 481990948

約数列:

[1, 2, 4, 557, 1114, 2228, 287239, 574478, 1148956, 159992123, 319984246, 639968492]

約数ペア:

[(1, 639968492), (2, 319984246), (4, 159992123), (557, 1148956), (1114, 574478), (2228, 287239)]