20881865

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{5227}}^1$

素因数の和:5296

約数の個数: 16

約数和(自身を含む): 27101952

約数和(自身を除く): 6220087

約数列:

[1, 5, 17, 47, 85, 235, 799, 3995, 5227, 26135, 88859, 245669, 444295, 1228345, 4176373, 20881865]

約数ペア:

[(1, 20881865), (5, 4176373), (17, 1228345), (47, 444295), (85, 245669), (235, 88859), (799, 26135), (3995, 5227)]