20891755

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1\times {\mathrm{457}}^1$

素因数の和:726

約数の個数: 16

約数和(自身を含む): 25853184

約数和(自身を除く): 4961429

約数列:

[1, 5, 41, 205, 223, 457, 1115, 2285, 9143, 18737, 45715, 93685, 101911, 509555, 4178351, 20891755]

約数ペア:

[(1, 20891755), (5, 4178351), (41, 509555), (205, 101911), (223, 93685), (457, 45715), (1115, 18737), (2285, 9143)]