160040

素因数分解:

$2^3\times 5^1\times {\mathrm{4001}}^1$

素因数の和:4012

約数の個数: 16

約数和(自身を含む): 360180

約数和(自身を除く): 200140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4001, 8002, 16004, 20005, 32008, 40010, 80020, 160040]

約数ペア:

[(1, 160040), (2, 80020), (4, 40010), (5, 32008), (8, 20005), (10, 16004), (20, 8002), (40, 4001)]