21063679

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{769}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 27036240

約数和(自身を除く): 5972561

約数列:

[1, 7, 13, 43, 49, 91, 301, 559, 637, 769, 2107, 3913, 5383, 9997, 27391, 33067, 37681, 69979, 231469, 429871, 489853, 1620283, 3009097, 21063679]

約数ペア:

[(1, 21063679), (7, 3009097), (13, 1620283), (43, 489853), (49, 429871), (91, 231469), (301, 69979), (559, 37681), (637, 33067), (769, 27391), (2107, 9997), (3913, 5383)]