18015640

素因数分解:

$2^3\times 5^1\times {\mathrm{450391}}^1$

素因数の和:450402

約数の個数: 16

約数和(自身を含む): 40535280

約数和(自身を除く): 22519640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 450391, 900782, 1801564, 2251955, 3603128, 4503910, 9007820, 18015640]

約数ペア:

[(1, 18015640), (2, 9007820), (4, 4503910), (5, 3603128), (8, 2251955), (10, 1801564), (20, 900782), (40, 450391)]