21027993

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{7309}}^1$

素因数の和:7456

約数の個数: 16

約数和(自身を含む): 32280960

約数和(自身を除く): 11252967

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 7309, 21927, 51163, 153489, 1001333, 3003999, 7009331, 21027993]

約数ペア:

[(1, 21027993), (3, 7009331), (7, 3003999), (21, 1001333), (137, 153489), (411, 51163), (959, 21927), (2877, 7309)]