21990982

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{5189}}^1$

素因数の和:5367

約数の個数: 16

約数和(自身を含む): 35748720

約数和(自身を除く): 13757738

約数列:

[1, 2, 13, 26, 163, 326, 2119, 4238, 5189, 10378, 67457, 134914, 845807, 1691614, 10995491, 21990982]

約数ペア:

[(1, 21990982), (2, 10995491), (13, 1691614), (26, 845807), (163, 134914), (326, 67457), (2119, 10378), (4238, 5189)]