Q:

Java program to count factors of a given number

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mahmoud2506
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2022-05-06
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Given an integer number and we have to count its all factors using java program.

Example:

    Input:
    Enter the number : 45
    Output:
    Number of factors of is : 6
    Explanation:
    45 is divisible by: 1, 3, 5, 9, 15, 45
    Thus, factors will be 6

 

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mahmoud2506
2022-05-06
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Program to count all factors of a number in java

import java.util.Scanner;

public class CountFactors
{
	public static void main(String[] args)
	{
		// create object
		Scanner in = new Scanner(System.in);
		
		// enter integer number here.
	    System.out.print("Enter the number : ");
	    int x = in.nextInt(); 
	    System.out.println("Number of factors of is : " +result(x));
	} 		
	
	// create function to find the factors of given number.
	public static int result(int num) 
	{	
		int ctr = 0;
		for(int i=1; i<=(int)Math.sqrt(num); i++)
	    {
	        if(num%i==0 && i*i!=num)
	        {
	            ctr+=2;
	        } 
	        else if (i*i==num) 
	        {
	            ctr++;
	        }
	    }
	        return ctr;
	}
}

Output

First run:
Enter the number : 45
Number of factors of is : 6

Second run:
Enter the number : 158
Number of factors of is : 4

 

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