The factors that I found of 162 are:
1, 2, 3, 6, 9, 18, 27, 54, 81, 162
Out of those factors the only half of the listed factors that is also in that list is 9 (9 is half of 18) and ultimately 18 x 9 = 162.
So, since I now know that your number, I can now proceed to what you are asking.
18 x 2 = 36.
The final answer is 36.
