21904267

素因数分解:

$7^1\times {\mathrm{11}}^3\times {\mathrm{2351}}^1$

素因数の和:2391

約数の個数: 16

約数和(自身を含む): 27546624

約数和(自身を除く): 5642357

約数列:

[1, 7, 11, 77, 121, 847, 1331, 2351, 9317, 16457, 25861, 181027, 284471, 1991297, 3129181, 21904267]

約数ペア:

[(1, 21904267), (7, 3129181), (11, 1991297), (77, 284471), (121, 181027), (847, 25861), (1331, 16457), (2351, 9317)]