20268157

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3137}}^1$

素因数の和:3228

約数の個数: 16

約数和(自身を含む): 25304832

約数和(自身を除く): 5036675

約数列:

[1, 7, 13, 71, 91, 497, 923, 3137, 6461, 21959, 40781, 222727, 285467, 1559089, 2895451, 20268157]

約数ペア:

[(1, 20268157), (7, 2895451), (13, 1559089), (71, 285467), (91, 222727), (497, 40781), (923, 21959), (3137, 6461)]