21081423

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{4663}}^1$

素因数の和:4814

約数の個数: 16

約数和(自身を含む): 30894336

約数和(自身を除く): 9812913

約数列:

[1, 3, 11, 33, 137, 411, 1507, 4521, 4663, 13989, 51293, 153879, 638831, 1916493, 7027141, 21081423]

約数ペア:

[(1, 21081423), (3, 7027141), (11, 1916493), (33, 638831), (137, 153879), (411, 51293), (1507, 13989), (4521, 4663)]