21241157

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 25807320

約数和(自身を除く): 4566163

約数列:

[1, 7, 41, 49, 97, 109, 287, 679, 763, 2009, 3977, 4469, 4753, 5341, 10573, 27839, 31283, 74011, 194873, 218981, 433493, 518077, 3034451, 21241157]

約数ペア:

[(1, 21241157), (7, 3034451), (41, 518077), (49, 433493), (97, 218981), (109, 194873), (287, 74011), (679, 31283), (763, 27839), (2009, 10573), (3977, 5341), (4469, 4753)]