21159815

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{2203}}^1$

素因数の和:2338

約数の個数: 16

約数和(自身を含む): 27135648

約数和(自身を除く): 5975833

約数列:

[1, 5, 17, 85, 113, 565, 1921, 2203, 9605, 11015, 37451, 187255, 248939, 1244695, 4231963, 21159815]

約数ペア:

[(1, 21159815), (5, 4231963), (17, 1244695), (85, 248939), (113, 187255), (565, 37451), (1921, 11015), (2203, 9605)]