21082975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{439}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 27989280

約数和(自身を除く): 6906305

約数列:

[1, 5, 17, 25, 85, 113, 425, 439, 565, 1921, 2195, 2825, 7463, 9605, 10975, 37315, 48025, 49607, 186575, 248035, 843319, 1240175, 4216595, 21082975]

約数ペア:

[(1, 21082975), (5, 4216595), (17, 1240175), (25, 843319), (85, 248035), (113, 186575), (425, 49607), (439, 48025), (565, 37315), (1921, 10975), (2195, 9605), (2825, 7463)]