# JavaScript: Compute the factors of a positive integer

## JavaScript Function: Exercise-13 with Solution

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

**Sample Solution-1:**

**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: **

**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**

**Sample Solution-2:**

**JavaScript Code:**

```
function find_Factors(num) {
let factors = [];
// Loop through all numbers from 1 to num/2 and check if they are a divisor
for (let i = 1; i <= num / 2; i++) {
if (num % i === 0) {
factors.push(i);
}
}
// Add num as a factor
factors.push(num);
return factors;
}
console.log(find_Factors(15));
console.log(find_Factors(16));
console.log(find_Factors(17));
```

Sample Output:

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

**Explanation: **

The above function takes a positive integer num as input and loops through all numbers from 1 to num/2 to check if they are divisors of the input number. If a number is a divisor, it is added to an array of factors. Lastly, the function returns an array of factors which includes the input number itself.

**Flowchart: **

**Live Demo: **

See the Pen javascript-function-exercise-13-1 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?**

Test your Programming skills with w3resource's quiz.

**Weekly Trends**- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join