20891110

素因数分解:

$2^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{9901}}^1$

素因数の和:10119

約数の個数: 16

約数和(自身を含む): 37786032

約数和(自身を除く): 16894922

約数列:

[1, 2, 5, 10, 211, 422, 1055, 2110, 9901, 19802, 49505, 99010, 2089111, 4178222, 10445555, 20891110]

約数ペア:

[(1, 20891110), (2, 10445555), (5, 4178222), (10, 2089111), (211, 99010), (422, 49505), (1055, 19802), (2110, 9901)]