21808731

素因数分解:

$3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{4657}}^1$

素因数の和:4890

約数の個数: 16

約数和(自身を含む): 33388544

約数和(自身を除く): 11579813

約数列:

[1, 3, 7, 21, 223, 669, 1561, 4657, 4683, 13971, 32599, 97797, 1038511, 3115533, 7269577, 21808731]

約数ペア:

[(1, 21808731), (3, 7269577), (7, 3115533), (21, 1038511), (223, 97797), (669, 32599), (1561, 13971), (4657, 4683)]