2. An integer is said to be a perfect number if the sum of its divisors, including 1 (but not the number itself), is equal to the number. For example, 6 is a perfect number, because 6=1+2+3. Write a program that asks the user for an integer and prints to the screen whether the number is perfect or not. For example, if the user enters 6 the program should display: 6 is a perfect number. If the user enters 7, the program should display: 7 is not a perfect