Python Program to Check if a Number is a Perfect Number

A number is said to be a Perfect Number when that is equal to the sum of all its positive divisors except itself. When it is required to check if a number is a perfect number, a simple ‘for’ loop can be used.

Below is the demonstration of the same −

Example

n = 6
my_sum = 0
for i in range(1, n):
   if(n % i == 0):
      my_sum = my_sum + i
if (my_sum == n):
   print("The number is a perfect number")
else:
   print("The number is not a perfect number")

Output

The number is a perfect number

Explanation

• The value for ‘n’ is specified.

• The sum is initialized to 0.

• The number is iterated over, and the sum is incremented.

• If this sum is equal to the previously defined ‘n’, it is considered a perfect number.

• Relevant messages are displayed on the console.