21090111

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{27143}}^1$

素因数の和:27190

約数の個数: 16

約数和(自身を含む): 33007104

約数和(自身を除く): 11916993

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 27143, 81429, 190001, 570003, 1004291, 3012873, 7030037, 21090111]

約数ペア:

[(1, 21090111), (3, 7030037), (7, 3012873), (21, 1004291), (37, 570003), (111, 190001), (259, 81429), (777, 27143)]