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<?php function perfect($n) { if ($n < 1) { echo "Number has to be Positive."; return false; } for($i = 1; $i <= $n; $i++) { if ($n % $i == 0) { $factors[] = $i; } } return ($n == array_sum($factors) / 2) ? true : false; echo "$n $factors [$i]"; } perfect(42); ?>

preferences:
35.04 ms | 402 KiB | 5 Q