21430881

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{463}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 32090240

約数和(自身を除く): 10659359

約数列:

[1, 3, 9, 37, 111, 139, 333, 417, 463, 1251, 1389, 4167, 5143, 15429, 17131, 46287, 51393, 64357, 154179, 193071, 579213, 2381209, 7143627, 21430881]

約数ペア:

[(1, 21430881), (3, 7143627), (9, 2381209), (37, 579213), (111, 193071), (139, 154179), (333, 64357), (417, 51393), (463, 46287), (1251, 17131), (1389, 15429), (4167, 5143)]