I wish I knew that, honestly. That makes no sense to me aswell. Basically, I'm running through a level system, that encourages programming through Perl, C#, C++, etc. This was one of the questions there, and that was given as relivent info. I was talking to a friend of mine (good math person), and he's the one that suggested another route to this (which I'm doing now, finding the prime numbers and multiplying that way). So if I can get this working, I'll find out if 13 * 2 = 26 has anything to do with this or not *lol*.
The relevance of 13*2=26 is that 13 and 2 are both primes and they are also factors of 26. That is supposed to help you figure what primes and factors are, which are needed to solve this problem.