19980459820

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2442599}}^1$

素因数の和:2443017

約数の個数: 24

約数和(自身を含む): 42061572000

約数和(自身を除く): 22081112180

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8180, 2442599, 4885198, 9770396, 12212995, 24425990, 48851980, 999022991, 1998045982, 3996091964, 4995114955, 9990229910, 19980459820]

約数ペア:

[(1, 19980459820), (2, 9990229910), (4, 4995114955), (5, 3996091964), (10, 1998045982), (20, 999022991), (409, 48851980), (818, 24425990), (1636, 12212995), (2045, 9770396), (4090, 4885198), (8180, 2442599)]