21152547

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13907}}^1$

素因数の和:13939

約数の個数: 18

約数和(自身を含む): 33087132

約数和(自身を除く): 11934585

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13907, 41721, 125163, 180791, 542373, 1627119, 2350283, 7050849, 21152547]

約数ペア:

[(1, 21152547), (3, 7050849), (9, 2350283), (13, 1627119), (39, 542373), (117, 180791), (169, 125163), (507, 41721), (1521, 13907)]