21490929

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{419}}^1$

素因数の和:605

約数の個数: 24

約数和(自身を含む): 32104800

約数和(自身を除く): 10613871

約数列:

[1, 3, 9, 41, 123, 139, 369, 417, 419, 1251, 1257, 3771, 5699, 17097, 17179, 51291, 51537, 58241, 154611, 174723, 524169, 2387881, 7163643, 21490929]

約数ペア:

[(1, 21490929), (3, 7163643), (9, 2387881), (41, 524169), (123, 174723), (139, 154611), (369, 58241), (417, 51537), (419, 51291), (1251, 17179), (1257, 17097), (3771, 5699)]