There is a number which has 8 divisors including, 8, itself, and 1. There is also a number which has 18 divisors, including 18, itself and 1. The difference between these numbers is 28. What are the two numbers?

The smallest such pair, that is the smallest n1,  with n1< n2, is (n1,n2) = (152, 180) 

Posted by K Sengupta on 2008-11-24 00:37:32