21245409

素因数分解:

$3^4\times {\mathrm{73}}^1\times {\mathrm{3593}}^1$

素因数の和:3678

約数の個数: 20

約数和(自身を含む): 32180676

約数和(自身を除く): 10935267

約数列:

[1, 3, 9, 27, 73, 81, 219, 657, 1971, 3593, 5913, 10779, 32337, 97011, 262289, 291033, 786867, 2360601, 7081803, 21245409]

約数ペア:

[(1, 21245409), (3, 7081803), (9, 2360601), (27, 786867), (73, 291033), (81, 262289), (219, 97011), (657, 32337), (1971, 10779), (3593, 5913)]