18720471

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{81041}}^1$

素因数の和:81062

約数の個数: 16

約数和(自身を含む): 31120128

約数和(自身を除く): 12399657

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 81041, 243123, 567287, 891451, 1701861, 2674353, 6240157, 18720471]

約数ペア:

[(1, 18720471), (3, 6240157), (7, 2674353), (11, 1701861), (21, 891451), (33, 567287), (77, 243123), (231, 81041)]