20897807

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:626

約数の個数: 16

約数和(自身を含む): 24552000

約数和(自身を除く): 3654193

約数列:

[1, 7, 61, 109, 427, 449, 763, 3143, 6649, 27389, 46543, 48941, 191723, 342587, 2985401, 20897807]

約数ペア:

[(1, 20897807), (7, 2985401), (61, 342587), (109, 191723), (427, 48941), (449, 46543), (763, 27389), (3143, 6649)]