19639640

素因数分解:

$2^3\times 5^1\times {\mathrm{490991}}^1$

素因数の和:491002

約数の個数: 16

約数和(自身を含む): 44189280

約数和(自身を除く): 24549640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 490991, 981982, 1963964, 2454955, 3927928, 4909910, 9819820, 19639640]

約数ペア:

[(1, 19639640), (2, 9819820), (4, 4909910), (5, 3927928), (8, 2454955), (10, 1963964), (20, 981982), (40, 490991)]