21809557

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{941}}^1$

素因数の和:1009

約数の個数: 24

約数和(自身を含む): 28350432

約数和(自身を除く): 6540875

約数列:

[1, 7, 11, 43, 49, 77, 301, 473, 539, 941, 2107, 3311, 6587, 10351, 23177, 40463, 46109, 72457, 283241, 445093, 507199, 1982687, 3115651, 21809557]

約数ペア:

[(1, 21809557), (7, 3115651), (11, 1982687), (43, 507199), (49, 445093), (77, 283241), (301, 72457), (473, 46109), (539, 40463), (941, 23177), (2107, 10351), (3311, 6587)]