21679217

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{7253}}^1$

素因数の和:7328

約数の個数: 12

約数和(自身を含む): 25635636

約数和(自身を除く): 3956419

約数列:

[1, 7, 49, 61, 427, 2989, 7253, 50771, 355397, 442433, 3097031, 21679217]

約数ペア:

[(1, 21679217), (7, 3097031), (49, 442433), (61, 355397), (427, 50771), (2989, 7253)]