Sum of Factor of a Given Number Using C- Program

Question

The Factor of a Given Number Using C-Program

Sample TestCase Expected Output

1. 1018

---

2. 1228

Answer

#include <stdio.h>

int main() 

{

    int num,  i, sum=0;

    scanf("%d", &num);

    for (i = 1; i <= num; ++i)

     {

        if (num % i == 0) 

        sum += i;    

    }

    printf("%d", sum);

    return 0;

}

Explanation:

What is the factor in math?

Factor, in mathematics, a number or algebraic expression that divides another number or expression evenly—i.e., with no remainder. For example, 3 and 6 are factors of 12 because 12 ÷ 3 = 4 exactly and 12 ÷ 6 = 2 exactly. .This called Factors of a number...

Here sum += i defines sum = sum + i 

sum = 0 + 1 = 1

sum = 1 + 2  = 3

sum = 3 + 5 = 8

sum = 8 + 10 = 18

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