21393081

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{33479}}^1$

素因数の和:33556

約数の個数: 12

約数和(自身を含む): 31337280

約数和(自身を除く): 9944199

約数列:

[1, 3, 9, 71, 213, 639, 33479, 100437, 301311, 2377009, 7131027, 21393081]

約数ペア:

[(1, 21393081), (3, 7131027), (9, 2377009), (71, 301311), (213, 100437), (639, 33479)]