20640160

素因数分解:

$2^5\times 5^1\times {\mathrm{129001}}^1$

素因数の和:129016

約数の個数: 24

約数和(自身を含む): 48762756

約数和(自身を除く): 28122596

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 129001, 258002, 516004, 645005, 1032008, 1290010, 2064016, 2580020, 4128032, 5160040, 10320080, 20640160]

約数ペア:

[(1, 20640160), (2, 10320080), (4, 5160040), (5, 4128032), (8, 2580020), (10, 2064016), (16, 1290010), (20, 1032008), (32, 645005), (40, 516004), (80, 258002), (160, 129001)]