20045525

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:725

約数の個数: 24

約数和(自身を含む): 26352480

約数和(自身を除く): 6306955

約数列:

[1, 5, 25, 29, 43, 145, 215, 643, 725, 1075, 1247, 3215, 6235, 16075, 18647, 27649, 31175, 93235, 138245, 466175, 691225, 801821, 4009105, 20045525]

約数ペア:

[(1, 20045525), (5, 4009105), (25, 801821), (29, 691225), (43, 466175), (145, 138245), (215, 93235), (643, 31175), (725, 27649), (1075, 18647), (1247, 16075), (3215, 6235)]