21111237

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7793}}^1$

素因数の和:7849

約数の個数: 24

約数和(自身を含む): 35665344

約数和(自身を除く): 14554107

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7793, 23379, 54551, 70137, 163653, 335099, 490959, 1005297, 2345693, 3015891, 7037079, 21111237]

約数ペア:

[(1, 21111237), (3, 7037079), (7, 3015891), (9, 2345693), (21, 1005297), (43, 490959), (63, 335099), (129, 163653), (301, 70137), (387, 54551), (903, 23379), (2709, 7793)]