21271115

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{3709}}^1$

素因数の和:3782

約数の個数: 16

約数和(自身を含む): 27068160

約数和(自身を除く): 5797045

約数列:

[1, 5, 31, 37, 155, 185, 1147, 3709, 5735, 18545, 114979, 137233, 574895, 686165, 4254223, 21271115]

約数ペア:

[(1, 21271115), (5, 4254223), (31, 686165), (37, 574895), (155, 137233), (185, 114979), (1147, 18545), (3709, 5735)]