21808857

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{14627}}^1$

素因数の和:14708

約数の個数: 16

約数和(自身を含む): 33702912

約数和(自身を除く): 11894055

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 14627, 43881, 102389, 307167, 1038517, 3115551, 7269619, 21808857]

約数ペア:

[(1, 21808857), (3, 7269619), (7, 3115551), (21, 1038517), (71, 307167), (213, 102389), (497, 43881), (1491, 14627)]