import java.util.Scanner;
public class PerfectNumber {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("How many perfect numbers do you want to print = ");
String str = sc.next();
int limit = Integer.parseInt(str);
int checkLimit = 1;
for( int i = 2; i < Integer.MAX_VALUE; i++ )
{
boolean bool = perfectNumber(i);// passing value in function
if(bool == true)
{
checkLimit++;
}
if(checkLimit > limit)
{
break;
}
}
}
public static boolean perfectNumber(int input){
boolean bool= false;
int size = 2000;
int[] arr = new int[size];
int counter = 0;
int divisorSum = 1;
for(int i = 2; i < input; i++)
{
if(input % i == 0)
{
arr[counter] = i;
divisorSum += arr[counter];
counter++;
}
}
if(divisorSum == input)
{
System.out.print(input+" is a perfect number and divisors's sum = ");
System.out.print("1");
for(int i = 0; i < size; i++)
{
if( arr[i] == 0 )
{
continue;
}
System.out.print("+"+arr[i]);
}
System.out.println("");
bool = true;
}
return bool;
}
}
- The output of this progarm will be like shown in an image below.
