w3resource
JavaScript Exercises

JavaScript: Compute the factors of a positive integers

JavaScript Function: Exercise-13 with Solution

Write a JavaScript function to compute the factors of a positive integer.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Compute the factors of a positive integer</title>
</head>
<body>
  
</body>
</html>

JavaScript Code:

function factors(n)
{
 var num_factors = [], i;
 
 for (i = 1; i <= Math.floor(Math.sqrt(n)); i += 1)
  if (n % i === 0)
  {
   num_factors.push(i);
   if (n / i !== i)
    num_factors.push(n / i);
  }
 num_factors.sort(function(x, y)
   {
     return x - y;});  // numeric sort
     return num_factors;
    }
console.log(factors(15));  // [1,3,5,15] 
console.log(factors(16));  // [1,2,4,8,16] 
console.log(factors(17));  // [1,17]

Sample Output:

[1,3,5,15]
[1,2,4,8,16]
[1,17]

Flowchart:

Flowchart: JavaScript function: Compute the factors of a positive integer

Live Demo:

See the Pen JavaScript - Compute the factors of a positive integers-function-ex- 13 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function which says whether a number is perfect.
Next: Write a JavaScript function to convert an amount to coins.

What is the difficulty level of this exercise?