21129968255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1\times {\mathrm{66571}}^1$

素因数の和:66815

約数の個数: 32

約数和(自身を含む): 28759104000

約数和(自身を除く): 7629135745

約数列:

[1, 5, 11, 29, 55, 145, 199, 319, 995, 1595, 2189, 5771, 10945, 28855, 63481, 66571, 317405, 332855, 732281, 1930559, 3661405, 9652795, 13247629, 21236149, 66238145, 106180745, 145723919, 384181241, 728619595, 1920906205, 4225993651, 21129968255]

約数ペア:

[(1, 21129968255), (5, 4225993651), (11, 1920906205), (29, 728619595), (55, 384181241), (145, 145723919), (199, 106180745), (319, 66238145), (995, 21236149), (1595, 13247629), (2189, 9652795), (5771, 3661405), (10945, 1930559), (28855, 732281), (63481, 332855), (66571, 317405)]