Find all natural numbers which can be written in the form (a+b+c)²/(abc) where a,b,c are also natural numbers.

I have yet to find any natural number over 9 and for the natural number 7.  I do know that 1, 2, 3, 4, 5, 6, 8 and 9 can be expressed in the form (a+b+c)²/(abc).

Posted by Dej Mar on 2007-10-14 22:59:29