20459765

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{1999}}^1$

素因数の和:2116

約数の個数: 16

約数和(自身を含む): 25920000

約数和(自身を除く): 5460235

約数列:

[1, 5, 23, 89, 115, 445, 1999, 2047, 9995, 10235, 45977, 177911, 229885, 889555, 4091953, 20459765]

約数ペア:

[(1, 20459765), (5, 4091953), (23, 889555), (89, 229885), (115, 177911), (445, 45977), (1999, 10235), (2047, 9995)]