21087315

素因数分解:

$3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{4831}}^1$

素因数の和:4939

約数の個数: 24

約数和(自身を含む): 36935808

約数和(自身を除く): 15848493

約数列:

[1, 3, 5, 9, 15, 45, 97, 291, 485, 873, 1455, 4365, 4831, 14493, 24155, 43479, 72465, 217395, 468607, 1405821, 2343035, 4217463, 7029105, 21087315]

約数ペア:

[(1, 21087315), (3, 7029105), (5, 4217463), (9, 2343035), (15, 1405821), (45, 468607), (97, 217395), (291, 72465), (485, 43479), (873, 24155), (1455, 14493), (4365, 4831)]