19725433

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^2$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 25196864

約数和(自身を除く): 5471431

約数列:

[1, 7, 13, 43, 71, 91, 301, 497, 559, 923, 3053, 3913, 5041, 6461, 21371, 35287, 39689, 65533, 216763, 277823, 458731, 1517341, 2817919, 19725433]

約数ペア:

[(1, 19725433), (7, 2817919), (13, 1517341), (43, 458731), (71, 277823), (91, 216763), (301, 65533), (497, 39689), (559, 35287), (923, 21371), (3053, 6461), (3913, 5041)]