18039640

素因数分解:

$2^3\times 5^1\times {\mathrm{450991}}^1$

素因数の和:451002

約数の個数: 16

約数和(自身を含む): 40589280

約数和(自身を除く): 22549640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 450991, 901982, 1803964, 2254955, 3607928, 4509910, 9019820, 18039640]

約数ペア:

[(1, 18039640), (2, 9019820), (4, 4509910), (5, 3607928), (8, 2254955), (10, 1803964), (20, 901982), (40, 450991)]