18000040

素因数分解:

$2^3\times 5^1\times {\mathrm{450001}}^1$

素因数の和:450012

約数の個数: 16

約数和(自身を含む): 40500180

約数和(自身を除く): 22500140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 450001, 900002, 1800004, 2250005, 3600008, 4500010, 9000020, 18000040]

約数ペア:

[(1, 18000040), (2, 9000020), (4, 4500010), (5, 3600008), (8, 2250005), (10, 1800004), (20, 900002), (40, 450001)]