81158710

素因数分解:

$2^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{20443}}^1$

素因数の和:20847

約数の個数: 16

約数和(自身を含む): 146460816

約数和(自身を除く): 65302106

約数列:

[1, 2, 5, 10, 397, 794, 1985, 3970, 20443, 40886, 102215, 204430, 8115871, 16231742, 40579355, 81158710]

約数ペア:

[(1, 81158710), (2, 40579355), (5, 16231742), (10, 8115871), (397, 204430), (794, 102215), (1985, 40886), (3970, 20443)]