21252319

素因数分解:

${\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 24

約数和(自身を含む): 24744384

約数和(自身を除く): 3492065

約数列:

[1, 11, 37, 47, 101, 121, 407, 517, 1111, 1739, 3737, 4477, 4747, 5687, 12221, 19129, 41107, 52217, 175639, 210419, 452177, 574387, 1932029, 21252319]

約数ペア:

[(1, 21252319), (11, 1932029), (37, 574387), (47, 452177), (101, 210419), (121, 175639), (407, 52217), (517, 41107), (1111, 19129), (1739, 12221), (3737, 5687), (4477, 4747)]