7200220

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{691}}^1$

素因数の和:1221

約数の個数: 24

約数和(自身を含む): 15171408

約数和(自身を除く): 7971188

約数列:

[1, 2, 4, 5, 10, 20, 521, 691, 1042, 1382, 2084, 2605, 2764, 3455, 5210, 6910, 10420, 13820, 360011, 720022, 1440044, 1800055, 3600110, 7200220]

約数ペア:

[(1, 7200220), (2, 3600110), (4, 1800055), (5, 1440044), (10, 720022), (20, 360011), (521, 13820), (691, 10420), (1042, 6910), (1382, 5210), (2084, 3455), (2605, 2764)]