21261845

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{2003}}^1$

素因数の和:2212

約数の個数: 16

約数和(自身を含む): 27991872

約数和(自身を除く): 6730027

約数列:

[1, 5, 11, 55, 193, 965, 2003, 2123, 10015, 10615, 22033, 110165, 386579, 1932895, 4252369, 21261845]

約数ペア:

[(1, 21261845), (5, 4252369), (11, 1932895), (55, 386579), (193, 110165), (965, 22033), (2003, 10615), (2123, 10015)]