How do I solve this problem?

This is the question, and I really need help on it.

Problem 5.
The numbers 4 and 12 have a special property.
4+12=16
4^12=48
and 16 is a factor of 48.

Find some other examples of pairs of numbers such that their sum is a factor of their product.

What condition must exist for pairs of numbers to be related on this way?

Thank you in advance!