Java Program to Check Abundant Number

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In the previous article, we have discussed Java Program to Check Xylem and Phloem Number

In this article we are going to understand what Abundant number is and how we can check whether a number is Abundant or not in Java with examples.

Program to Check Abundant Number

Abundant numbers are numbers whose sum of all proper divisors is more than the number.

 Example :

Abundant Number:

12: Divisors- 1,2,3,4,6;             Sum = 1+2+3+4+6 = 16>12               
40: Divisors- 1,2,4,5,8,10,20;   Sum = 1+2+4+5+8+10+20 = 50>40  

Not Abundant Number:

15: Divisors- 1,3,5;                   Sum = 1+3+5 = 9<15

In the above examples the numbers 15 is not abundant numbers as sum of its divisors are lesser than the number itself. Hence 12,40 are Abundant numbers.

Let’s see different ways to check abundant number.

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Approach :

  1. Enter/Declare a number and store it .
  2. Then we find the divisors of the number and add them up.
  3. If the resultant sum is greater than the number itself, then the number is said to be an Abundant number.

Method-1: Java Program to Check Abundant Number By Using Static Value

import java.util.Scanner;

public class AbundantNumber
{
    public static void main(String args[])
    {
        //A n number declared;
        int num = 40;

        int sum = 0;
        // Loop to find the divisors as well as add them up
        for(int i = 1; i<num; i++)
            if(num%i==0)
                sum+=i;
        
        if(sum>num)
        {
            System.out.println(num+" is an Abundant number");
        }
        else
        {
            System.out.println(num+" is Not an Abundant number");
        }
    }
}


Output:

40 is an Abundant number

Method-2: Java Program to Check Abundant Number By User Input Value

import java.util.Scanner;

public class AbundantNumber
{
    public static void main(String args[])
    {
        //Taking the number as input from the user using scanner class
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter a number : ");
        int num = scan.nextInt();

        int sum = 0;
        // Loop to find the divisors as well as add them up
        for(int i = 1; i<num; i++)
            if(num%i==0)
                sum+=i;
        
        if(sum>num)
        {
            System.out.println(num+" is an Abundant number");
        }
        else
        {
            System.out.println(num+" is Not an Abundant number");
        }
    }
}


Output:

Case-1

Enter a number : 40
40 is an Abundant number

Case-2

Enter a number : 15
15 is Not an Abundant number

Method-3: Java Program to Check Abundant Number By User Defined Method

import java.util.Scanner;

public class AbundantNumber
{
    public static void main(String args[])
    {
        //Taking the number as input from the user using scanner class
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter a number : ");
        int num = scan.nextInt();
        //checkNumber() method called to check Abudant number
        checkNumber(num);
    }
    
    public static void checkNumber(int num)
    {
        int sum = 0;
        // Loop to find the divisors as well as add them up
        for(int i = 1; i<num; i++)
            if(num%i==0)
                sum+=i;
        
        if(sum>num)
        {
            System.out.println(num+" is an Abundant number");
        }
        else
        {
            System.out.println(num+" is Not an Abundant number");
        }
    }
}


Output:

Case-1

Enter a number : 40
40 is an Abundant number

Case-2

Enter a number : 15
15 is Not an Abundant number

If you are new to Java and want to learn the java coding skills too fast. Try practicing the core java programs with the help of the Java basic programs list available.

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