218219991

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{8467}}^1$

素因数の和:8563

約数の個数: 24

約数和(自身を含む): 324358272

約数和(自身を除く): 106138281

約数列:

[1, 3, 11, 33, 71, 121, 213, 363, 781, 2343, 8467, 8591, 25401, 25773, 93137, 279411, 601157, 1024507, 1803471, 3073521, 6612727, 19838181, 72739997, 218219991]

約数ペア:

[(1, 218219991), (3, 72739997), (11, 19838181), (33, 6612727), (71, 3073521), (121, 1803471), (213, 1024507), (363, 601157), (781, 279411), (2343, 93137), (8467, 25773), (8591, 25401)]