SOLUTION: 561 is the product of 3 different prime numbers. How many factors of 561 are not prime?

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Question 382408: 561 is the product of 3 different prime numbers. How many factors of 561 are not prime?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: Say that 'a', 'b', and 'c' are the prime numbers. So this means that abc=561. So all you need to do is find all the products of two numbers using the primes 'a', 'b', and 'c'. These products are: ab, bc, and ac. From there, determine which numbers are prime.

Note: we know that 'a', 'b', and 'c' are prime and that abc is prime.