20557999

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{887}}^1$

素因数の和:955

約数の個数: 24

約数和(自身を含む): 26725248

約数和(自身を除く): 6167249

約数列:

[1, 7, 11, 43, 49, 77, 301, 473, 539, 887, 2107, 3311, 6209, 9757, 23177, 38141, 43463, 68299, 266987, 419551, 478093, 1868909, 2936857, 20557999]

約数ペア:

[(1, 20557999), (7, 2936857), (11, 1868909), (43, 478093), (49, 419551), (77, 266987), (301, 68299), (473, 43463), (539, 38141), (887, 23177), (2107, 9757), (3311, 6209)]