18209540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8353}}^1$

素因数の和:8471

約数の個数: 24

約数和(自身を含む): 38595480

約数和(自身を除く): 20385940

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8353, 16706, 33412, 41765, 83530, 167060, 910477, 1820954, 3641908, 4552385, 9104770, 18209540]

約数ペア:

[(1, 18209540), (2, 9104770), (4, 4552385), (5, 3641908), (10, 1820954), (20, 910477), (109, 167060), (218, 83530), (436, 41765), (545, 33412), (1090, 16706), (2180, 8353)]