21911281

素因数分解:

$7^2\times {\mathrm{239}}^1\times {\mathrm{1871}}^1$

素因数の和:2124

約数の個数: 12

約数和(自身を含む): 25608960

約数和(自身を除く): 3697679

約数列:

[1, 7, 49, 239, 1673, 1871, 11711, 13097, 91679, 447169, 3130183, 21911281]

約数ペア:

[(1, 21911281), (7, 3130183), (49, 447169), (239, 91679), (1673, 13097), (1871, 11711)]