Program to find number is perfect or not

 Positive integer that is equal to sum of  its positive divisor excluding the number itself.

Program

n=int(input("enter number"))

sum=0

for i in range(1,n):

    if(n%i==0):

        sum=sum+i

if(sum==n):

    print("number is perfect")

else:

    print("number is not perfect")

Output

enter number6

number is perfect

=== Code Execution Successful ===

Example1

Number is 6

Divisor of 6 is

1,2,3

And sum of divisor is 

1+2+3=6

Sum of divisor is equal to the number so 6 is perfect number.

Example2

Number is 5

Divisor of 5 is

1

So sum of divisor is not equal to the number so 5 is not perfect number.