20123143940

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2534401}}^1$

素因数の和:2534807

約数の個数: 24

約数和(自身を含む): 42365063832

約数和(自身を除く): 22241919892

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 3970, 7940, 2534401, 5068802, 10137604, 12672005, 25344010, 50688020, 1006157197, 2012314394, 4024628788, 5030785985, 10061571970, 20123143940]

約数ペア:

[(1, 20123143940), (2, 10061571970), (4, 5030785985), (5, 4024628788), (10, 2012314394), (20, 1006157197), (397, 50688020), (794, 25344010), (1588, 12672005), (1985, 10137604), (3970, 5068802), (7940, 2534401)]