12720155

素因数分解:

$5^1\times 7^3\times {\mathrm{7417}}^1$

素因数の和:7443

約数の個数: 16

約数和(自身を含む): 17803200

約数和(自身を除く): 5083045

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 7417, 37085, 51919, 259595, 363433, 1817165, 2544031, 12720155]

約数ペア:

[(1, 12720155), (5, 2544031), (7, 1817165), (35, 363433), (49, 259595), (245, 51919), (343, 37085), (1715, 7417)]