C Program to Display Factors of a Number

To understand this example, you should have the knowledge of the following C programming topics:


This program takes a positive integer from the user and displays all the positive factors of that number.


Factors of a Positive Integer

#include <stdio.h>
int main() {
    int num, i;
    printf("Enter a positive integer: ");
    scanf("%d", &num);
    printf("Factors of %d are: ", num);
    for (i = 1; i <= num; ++i) {
        if (num % i == 0) {
            printf("%d ", i);
        }
    }
    return 0;
}

Output

Enter a positive integer: 60
Factors of 60 are: 1 2 3 4 5 6 10 12 15 20 30 60

In the program, a positive integer entered by the user is stored in num.

The for loop is iterated until i is false.

In each iteration, whether num is exactly divisible by i is checked. It is the condition for i to be a factor of num.

if (num % i == 0) {
            printf("%d ", i);
}

Then the value of i is incremented by 1.

Did you find this article helpful?

Our premium learning platform, created with over a decade of experience and thousands of feedbacks.

Learn and improve your coding skills like never before.

Try Programiz PRO
  • Interactive Courses
  • Certificates
  • AI Help
  • 2000+ Challenges