21163989

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{8329}}^1$

素因数の和:8361

約数の個数: 24

約数和(自身を含む): 35452480

約数和(自身を除く): 14288491

約数列:

[1, 3, 7, 11, 21, 33, 77, 121, 231, 363, 847, 2541, 8329, 24987, 58303, 91619, 174909, 274857, 641333, 1007809, 1923999, 3023427, 7054663, 21163989]

約数ペア:

[(1, 21163989), (3, 7054663), (7, 3023427), (11, 1923999), (21, 1007809), (33, 641333), (77, 274857), (121, 174909), (231, 91619), (363, 58303), (847, 24987), (2541, 8329)]