18211640

素因数分解:

$2^3\times 5^1\times {\mathrm{455291}}^1$

素因数の和:455302

約数の個数: 16

約数和(自身を含む): 40976280

約数和(自身を除く): 22764640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 455291, 910582, 1821164, 2276455, 3642328, 4552910, 9105820, 18211640]

約数ペア:

[(1, 18211640), (2, 9105820), (4, 4552910), (5, 3642328), (8, 2276455), (10, 1821164), (20, 910582), (40, 455291)]