81167359

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{20743}}^1$

素因数の和:20806

約数の個数: 16

約数和(自身を含む): 102226432

約数和(自身を除く): 21059073

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 20743, 145201, 269659, 891949, 1887613, 6243643, 11595337, 81167359]

約数ペア:

[(1, 81167359), (7, 11595337), (13, 6243643), (43, 1887613), (91, 891949), (301, 269659), (559, 145201), (3913, 20743)]