20815805

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{317}}^1\times {\mathrm{571}}^1$

素因数の和:916

約数の個数: 16

約数和(自身を含む): 26193024

約数和(自身を除く): 5377219

約数列:

[1, 5, 23, 115, 317, 571, 1585, 2855, 7291, 13133, 36455, 65665, 181007, 905035, 4163161, 20815805]

約数ペア:

[(1, 20815805), (5, 4163161), (23, 905035), (115, 181007), (317, 65665), (571, 36455), (1585, 13133), (2855, 7291)]