Question

How to check whether a number is a perfect number in Node.js

Answer 1

// If the sum of all factors of a number is equal to the number, then the number is perfect

// Factors of a number are numbers that divide the number evenly

function isPerfectNumber(n) {
    let i = 1;
    let sum = 0;
      
    while (i < n) {
        if (n % i == 0) {
            sum = sum + i;
        }
        i++;
    }
    return sum == n;
}
 
n = 496;
  
if (isPerfectNumber(n))
    console.log("Perfect Number");
else
    console.log("Not Perfect Number");

   
   
   
   
/*
run:
   
Perfect Number

*/

 

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