21096580

素因数分解:

$2^2\times 5^1\times {\mathrm{397}}^1\times {\mathrm{2657}}^1$

素因数の和:3063

約数の個数: 24

約数和(自身を含む): 44431128

約数和(自身を除く): 23334548

約数列:

[1, 2, 4, 5, 10, 20, 397, 794, 1588, 1985, 2657, 3970, 5314, 7940, 10628, 13285, 26570, 53140, 1054829, 2109658, 4219316, 5274145, 10548290, 21096580]

約数ペア:

[(1, 21096580), (2, 10548290), (4, 5274145), (5, 4219316), (10, 2109658), (20, 1054829), (397, 53140), (794, 26570), (1588, 13285), (1985, 10628), (2657, 7940), (3970, 5314)]