168408040

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{8081}}^1$

素因数の和:8613

約数の個数: 32

約数和(自身を含む): 379692360

約数和(自身を除く): 211284320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1042, 2084, 2605, 4168, 5210, 8081, 10420, 16162, 20840, 32324, 40405, 64648, 80810, 161620, 323240, 4210201, 8420402, 16840804, 21051005, 33681608, 42102010, 84204020, 168408040]

約数ペア:

[(1, 168408040), (2, 84204020), (4, 42102010), (5, 33681608), (8, 21051005), (10, 16840804), (20, 8420402), (40, 4210201), (521, 323240), (1042, 161620), (2084, 80810), (2605, 64648), (4168, 40405), (5210, 32324), (8081, 20840), (10420, 16162)]