21686287

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{317}}^1\times {\mathrm{337}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 25796160

約数和(自身を除く): 4109873

約数列:

[1, 7, 29, 203, 317, 337, 2219, 2359, 9193, 9773, 64351, 68411, 106829, 747803, 3098041, 21686287]

約数ペア:

[(1, 21686287), (7, 3098041), (29, 747803), (203, 106829), (317, 68411), (337, 64351), (2219, 9773), (2359, 9193)]