20315155

素因数分解:

$5^1\times 7^2\times {\mathrm{283}}^1\times {\mathrm{293}}^1$

素因数の和:595

約数の個数: 24

約数和(自身を含む): 28555632

約数和(自身を除く): 8240477

約数列:

[1, 5, 7, 35, 49, 245, 283, 293, 1415, 1465, 1981, 2051, 9905, 10255, 13867, 14357, 69335, 71785, 82919, 414595, 580433, 2902165, 4063031, 20315155]

約数ペア:

[(1, 20315155), (5, 4063031), (7, 2902165), (35, 580433), (49, 414595), (245, 82919), (283, 71785), (293, 69335), (1415, 14357), (1465, 13867), (1981, 10255), (2051, 9905)]