21609511

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:883

約数の個数: 24

約数和(自身を含む): 28055552

約数和(自身を除く): 6446041

約数列:

[1, 7, 11, 31, 77, 121, 217, 341, 823, 847, 2387, 3751, 5761, 9053, 25513, 26257, 63371, 99583, 178591, 280643, 697081, 1964501, 3087073, 21609511]

約数ペア:

[(1, 21609511), (7, 3087073), (11, 1964501), (31, 697081), (77, 280643), (121, 178591), (217, 99583), (341, 63371), (823, 26257), (847, 25513), (2387, 9053), (3751, 5761)]