21390306

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{509293}}^1$

素因数の和:509305

約数の個数: 16

約数和(自身を含む): 48892224

約数和(自身を除く): 27501918

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 509293, 1018586, 1527879, 3055758, 3565051, 7130102, 10695153, 21390306]

約数ペア:

[(1, 21390306), (2, 10695153), (3, 7130102), (6, 3565051), (7, 3055758), (14, 1527879), (21, 1018586), (42, 509293)]