21820001

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{521}}^1$

素因数の和:752

約数の個数: 16

約数和(自身を含む): 25924608

約数和(自身を除く): 4104607

約数列:

[1, 7, 31, 193, 217, 521, 1351, 3647, 5983, 16151, 41881, 100553, 113057, 703871, 3117143, 21820001]

約数ペア:

[(1, 21820001), (7, 3117143), (31, 703871), (193, 113057), (217, 100553), (521, 41881), (1351, 16151), (3647, 5983)]