Check Whether a Number is a Perfect Number or not in Python

In this example, you will learn to check whether number is perfect number or not based on user input.

What is Perfect Number?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3.

Example :

    
#Python Program to Check a Number is a Perfect Number or Not

num = int(input("Enter a number :: "))
sumOfFactors = 0

#Calculating the sum of Factors
for i in range(1,num):
    if num%i == 0:
        sumOfFactors += i;

if sumOfFactors == num:
    print(num ," is Perfect Number")
else:
    print(num ,"is not a Perfect Number")
       

Output :

    
Enter a number :: 10
10 is not a Perfect Number