21258760

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4967}}^1$

素因数の和:5085

約数の個数: 32

約数和(自身を含む): 48288960

約数和(自身を除く): 27030200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4967, 9934, 19868, 24835, 39736, 49670, 99340, 198680, 531469, 1062938, 2125876, 2657345, 4251752, 5314690, 10629380, 21258760]

約数ペア:

[(1, 21258760), (2, 10629380), (4, 5314690), (5, 4251752), (8, 2657345), (10, 2125876), (20, 1062938), (40, 531469), (107, 198680), (214, 99340), (428, 49670), (535, 39736), (856, 24835), (1070, 19868), (2140, 9934), (4280, 4967)]