20979651

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90821}}^1$

素因数の和:90842

約数の個数: 16

約数和(自身を含む): 34875648

約数和(自身を除く): 13895997

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90821, 272463, 635747, 999031, 1907241, 2997093, 6993217, 20979651]

約数ペア:

[(1, 20979651), (3, 6993217), (7, 2997093), (11, 1907241), (21, 999031), (33, 635747), (77, 272463), (231, 90821)]