19866125

素因数分解:

$5^3\times {\mathrm{103}}^1\times {\mathrm{1543}}^1$

素因数の和:1661

約数の個数: 16

約数和(自身を含む): 25049856

約数和(自身を除く): 5183731

約数列:

[1, 5, 25, 103, 125, 515, 1543, 2575, 7715, 12875, 38575, 158929, 192875, 794645, 3973225, 19866125]

約数ペア:

[(1, 19866125), (5, 3973225), (25, 794645), (103, 192875), (125, 158929), (515, 38575), (1543, 12875), (2575, 7715)]