19983640

素因数分解:

$2^3\times 5^1\times {\mathrm{499591}}^1$

素因数の和:499602

約数の個数: 16

約数和(自身を含む): 44963280

約数和(自身を除く): 24979640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499591, 999182, 1998364, 2497955, 3996728, 4995910, 9991820, 19983640]

約数ペア:

[(1, 19983640), (2, 9991820), (4, 4995910), (5, 3996728), (8, 2497955), (10, 1998364), (20, 999182), (40, 499591)]