39857980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28069}}^1$

素因数の和:28149

約数の個数: 24

約数和(自身を含む): 84883680

約数和(自身を除く): 45025700

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 28069, 56138, 112276, 140345, 280690, 561380, 1992899, 3985798, 7971596, 9964495, 19928990, 39857980]

約数ペア:

[(1, 39857980), (2, 19928990), (4, 9964495), (5, 7971596), (10, 3985798), (20, 1992899), (71, 561380), (142, 280690), (284, 140345), (355, 112276), (710, 56138), (1420, 28069)]