Question Number
12
Project Euler Question

The sequence of triangle numbers is generated by adding the natural numbers. So the 7th triangle number would be 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28. The first ten terms would be:
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, ...
Let us list the factors of the first seven triangle numbers:
 1: 1 3: 1,3 6: 1,2,3,610: 1,2,5,1015: 1,3,5,1521: 1,3,7,2128: 1,2,4,7,14,28
We can see that 28 is the first triangle number to have over five divisors.
What is the value of the first triangle number to have over five hundred divisors?

Solution Found
False

File Status: Solution File found. Code from the function code_solution_12 will be used

Solution: 76576500

Solution Code:

      <?php

  function code_solution_12() {
    $debug = true;

    $a = 1;
    $counter = 1;
    $factors = [1];

    while(count($factors) < 500) {
      $a++;
      $counter+=$a;
      $factors = get_factors($counter);
    }

    return $counter;
  }