19905907

素因数分解:

$7^2\times {\mathrm{109}}^1\times {\mathrm{3727}}^1$

素因数の和:3850

約数の個数: 12

約数和(自身を含む): 23374560

約数和(自身を除く): 3468653

約数列:

[1, 7, 49, 109, 763, 3727, 5341, 26089, 182623, 406243, 2843701, 19905907]

約数ペア:

[(1, 19905907), (7, 2843701), (49, 406243), (109, 182623), (763, 26089), (3727, 5341)]