20918812

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{121621}}^1$

素因数の和:121668

約数の個数: 12

約数和(自身を含む): 37459576

約数和(自身を除く): 16540764

約数列:

[1, 2, 4, 43, 86, 172, 121621, 243242, 486484, 5229703, 10459406, 20918812]

約数ペア:

[(1, 20918812), (2, 10459406), (4, 5229703), (43, 486484), (86, 243242), (172, 121621)]