Factor Pairs

Print all factor pairs (i, n/i) of a given number.

JavaIntermediate

Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int n = sc.nextInt();

        for (int i = 1; i * i <= n; i++) {
            if (n % i == 0) {
                System.out.println(i + " x " + (n / i));
            }
        }
        sc.close();
    }
}

Output

Enter a number: 12
1 x 12
2 x 6
3 x 4

We only loop up to √n and print factor pairs when i divides n.

Multiplication Table

Prime Check