21690361

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6551}}^1$

素因数の和:6612

約数の個数: 16

約数和(自身を含む): 27675648

約数和(自身を除く): 5985287

約数列:

[1, 7, 11, 43, 77, 301, 473, 3311, 6551, 45857, 72061, 281693, 504427, 1971851, 3098623, 21690361]

約数ペア:

[(1, 21690361), (7, 3098623), (11, 1971851), (43, 504427), (77, 281693), (301, 72061), (473, 45857), (3311, 6551)]