21439467

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17911}}^1$

素因数の和:17943

約数の個数: 24

約数和(自身を含む): 37256960

約数和(自身を除く): 15817493

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17911, 53733, 125377, 161199, 340309, 376131, 1020927, 1128393, 2382163, 3062781, 7146489, 21439467]

約数ペア:

[(1, 21439467), (3, 7146489), (7, 3062781), (9, 2382163), (19, 1128393), (21, 1020927), (57, 376131), (63, 340309), (133, 161199), (171, 125377), (399, 53733), (1197, 17911)]