20145820

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4517}}^1$

素因数の和:4749

約数の個数: 24

約数和(自身を含む): 42505344

約数和(自身を除く): 22359524

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4517, 9034, 18068, 22585, 45170, 90340, 1007291, 2014582, 4029164, 5036455, 10072910, 20145820]

約数ペア:

[(1, 20145820), (2, 10072910), (4, 5036455), (5, 4029164), (10, 2014582), (20, 1007291), (223, 90340), (446, 45170), (892, 22585), (1115, 18068), (2230, 9034), (4460, 4517)]