Question 44078
if you can divide 27 by a number and get a an whole number (integer) as a result, the number you divided 27 by is a factor of 27.
You should find that the factors of 17 are:
1,3,9 and 27

I hope this helps 
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk