Sum of proper divisors ID:223

Given a natural number N , the program must print the sum of all its proper divisors.

Definition: A proper divisor of a natural number is the divisor that is strictly less than the number.

Boundary Conditions:
1 < N <= 100000

Input Format:
First line will contain the integer value of N.

Output Format:
First line will contain the sum of all the proper divisors of N.

Sample Input/Output:

Example 1:
Input:
2

Output:
1

Explanation:
1 is the only proper divisor of 2. Hence sum is also 1.

Example 2:
Input:
20

Output:
22

Explanation:
The proper divisors of 20 are 1,2,4,5,10. Hence their sum is 22

#include<stdio.h>

int divSum(int num)

{

int result = 0;

for (int i=2; i<=sqrt(num); i++)

{ if (num%i==0)

{

if (i==(num/i))

result += i;

else

result += (i + num/i);

}

}

return (result + 1);

}

int main()

{

int num;

scanf("%d",&num);

printf("%d",divSum(num));

return 0;

}