The problem: You are to write a program which will input a positive integer n and output the number of
divisors of n and the sum of those divisors. (Note: by divisor we mean a positive integer
divisor this includes 1 and n.)

Source code after the jump

<?php
//Problem 01
echo "Please give me a positive integer: ";
$n = (int)trim(fgets(STDIN));
$d = 0;
$s = 0;
for($x = 1; $x <= $n; $x++){
    if($n%$x == 0){
        $d++;
        $s += $x;
    }
}
echo "$n has $d divisors and their sum is $s.\n";

?>