21981321

素因数分解:

$3^3\times {\mathrm{139}}^1\times {\mathrm{5857}}^1$

素因数の和:6005

約数の個数: 16

約数和(自身を含む): 32804800

約数和(自身を除く): 10823479

約数列:

[1, 3, 9, 27, 139, 417, 1251, 3753, 5857, 17571, 52713, 158139, 814123, 2442369, 7327107, 21981321]

約数ペア:

[(1, 21981321), (3, 7327107), (9, 2442369), (27, 814123), (139, 158139), (417, 52713), (1251, 17571), (3753, 5857)]