18007540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{20939}}^1$

素因数の和:20991

約数の個数: 24

約数和(自身を含む): 38697120

約数和(自身を除く): 20689580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 20939, 41878, 83756, 104695, 209390, 418780, 900377, 1800754, 3601508, 4501885, 9003770, 18007540]

約数ペア:

[(1, 18007540), (2, 9003770), (4, 4501885), (5, 3601508), (10, 1800754), (20, 900377), (43, 418780), (86, 209390), (172, 104695), (215, 83756), (430, 41878), (860, 20939)]