21319694

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{2441}}^1$

素因数の和:2851

約数の個数: 16

約数和(自身を含む): 34988976

約数和(自身を除く): 13669282

約数列:

[1, 2, 11, 22, 397, 794, 2441, 4367, 4882, 8734, 26851, 53702, 969077, 1938154, 10659847, 21319694]

約数ペア:

[(1, 21319694), (2, 10659847), (11, 1938154), (22, 969077), (397, 53702), (794, 26851), (2441, 8734), (4367, 4882)]