An integer value that evenly divides a larger integer value is often called a factor. A positive integer value that is greater than 1 is perfect if it is equal to the sum of its factors. For example, the number 6 has the factors 1, 2, and 3; 1+2+3=6. Therefore 6 is perfect. The number 10 has the factors 1, 2, and 5; 1+2+5=8. Therefore 10 is not perfect