Sum of divisors
Basic Accuracy: 67.01% Submissions: 777 Points: 1

Given a natural number n, calculate sum of all its proper divisors. A proper divisor of a natural number is the divisor that is strictly less than the number.

Example 1:

Input: n = 10
Output: 8 
Explanation: Proper divisors 1 + 2 + 5 = 8. 


Example 2:

Input: n = 6
Output: 6
Explanation: Proper divisors 1 + 2 + 3 = 6. 


Your Task:  
You dont need to read input or print anything. Complete the function divSum() which takes n as input parameter and returns sum of proper divisors of n.


Expected Time Complexity: O(sqrt(n))
Expected Auxiliary Space: O(1)

Constraints:
2<= n <=106

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Sum of divisors

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