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CountFactors Demo Task at Codility.com

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Codility.com Tests 100/100 Solutions

Lesson 8 –  Prime and composite numbers – CountFactors demo task solution code written in php. Gives 100/100 score at the time of publishing.

The description of the problem is copyrighted, so please see the following link for it: //codility.com/demo/take-sample-test/count_factors

Solution in php:

function solution($N) {
    $result = 0;
    $sqrtN  = intval(sqrt($N));
    $i      = 1;
    while($i <= $sqrtN){
        if($N % $i == 0){
            $result += 2;
    if($sqrtN * $sqrtN == $N){
    return $result;

Given “AS IS”, can be ported from other languages from solutions found on the internet, please use with care.

Please note: we think that codility.com does not give a correct assessment of your real-world programming skills. For instance, reading the below would bring more understanding why: //x20x.co.uk/2014/02/why-i-refuse-to-use-codility-and-so-should-you/

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