20715875

素因数分解:

$5^3\times {\mathrm{103}}^1\times {\mathrm{1609}}^1$

素因数の和:1727

約数の個数: 16

約数和(自身を含む): 26120640

約数和(自身を除く): 5404765

約数列:

[1, 5, 25, 103, 125, 515, 1609, 2575, 8045, 12875, 40225, 165727, 201125, 828635, 4143175, 20715875]

約数ペア:

[(1, 20715875), (5, 4143175), (25, 828635), (103, 201125), (125, 165727), (515, 40225), (1609, 12875), (2575, 8045)]