21221605

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{463}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 26058240

約数和(自身を除く): 4836635

約数列:

[1, 5, 89, 103, 445, 463, 515, 2315, 9167, 41207, 45835, 47689, 206035, 238445, 4244321, 21221605]

約数ペア:

[(1, 21221605), (5, 4244321), (89, 238445), (103, 206035), (445, 47689), (463, 45835), (515, 41207), (2315, 9167)]