639604

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{431}}^1$

素因数の和:495

約数の個数: 24

約数和(自身を含む): 1306368

約数和(自身を除く): 666764

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 212, 371, 431, 742, 862, 1484, 1724, 3017, 6034, 12068, 22843, 45686, 91372, 159901, 319802, 639604]

約数ペア:

[(1, 639604), (2, 319802), (4, 159901), (7, 91372), (14, 45686), (28, 22843), (53, 12068), (106, 6034), (212, 3017), (371, 1724), (431, 1484), (742, 862)]