18802180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21863}}^1$

素因数の和:21915

約数の個数: 24

約数和(自身を含む): 40404672

約数和(自身を除く): 21602492

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21863, 43726, 87452, 109315, 218630, 437260, 940109, 1880218, 3760436, 4700545, 9401090, 18802180]

約数ペア:

[(1, 18802180), (2, 9401090), (4, 4700545), (5, 3760436), (10, 1880218), (20, 940109), (43, 437260), (86, 218630), (172, 109315), (215, 87452), (430, 43726), (860, 21863)]