21305525

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{743}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 28045824

約数和(自身を除く): 6740299

約数列:

[1, 5, 25, 31, 37, 155, 185, 743, 775, 925, 1147, 3715, 5735, 18575, 23033, 27491, 28675, 115165, 137455, 575825, 687275, 852221, 4261105, 21305525]

約数ペア:

[(1, 21305525), (5, 4261105), (25, 852221), (31, 687275), (37, 575825), (155, 137455), (185, 115165), (743, 28675), (775, 27491), (925, 23033), (1147, 18575), (3715, 5735)]