20090721

素因数分解:

$3^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{4957}}^1$

素因数の和:5160

約数の個数: 16

約数和(自身を含む): 30779264

約数和(自身を除く): 10688543

約数列:

[1, 3, 7, 21, 193, 579, 1351, 4053, 4957, 14871, 34699, 104097, 956701, 2870103, 6696907, 20090721]

約数ペア:

[(1, 20090721), (3, 6696907), (7, 2870103), (21, 956701), (193, 104097), (579, 34699), (1351, 14871), (4053, 4957)]