21560357

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^2$

素因数の和:209

約数の個数: 24

約数和(自身を含む): 27487488

約数和(自身を除く): 5927131

約数列:

[1, 7, 13, 47, 71, 91, 329, 497, 611, 923, 3337, 4277, 5041, 6461, 23359, 35287, 43381, 65533, 236927, 303667, 458731, 1658489, 3080051, 21560357]

約数ペア:

[(1, 21560357), (7, 3080051), (13, 1658489), (47, 458731), (71, 303667), (91, 236927), (329, 65533), (497, 43381), (611, 35287), (923, 23359), (3337, 6461), (4277, 5041)]