function factors($n = 0) {
  $pf = array();
  for ($i = 2; $i <= $n / $i; $i++) {
    while ($n % $i == 0) {
      $pf[] = $i;
      $n = $n / $i;
    }
  }
  if ($n > 1) $pf[] = $n;
  return $pf;
}

$string = str_replace(' ', '', 'AWVLI QIQVT QOSQO ELGCV IIQWD LCUQE EOENN WWOAOLTDNU QTGAW TSMDO QTLAO QSDCH PQQIQ DQQTQ OOTUDBNIQH BHHTD UTEET FDUEA UMORE SQEQE MLTME TIRECLICAI QATUN QRALT ENEIN RKG');
$factors = factors(strlen($string));
$code = str_split($string, $primeFactor[1]);

$answer = 'Answer: ';
for ($i = 0; $i < $primeFactor[1]; $i++) {
  foreach ($code as $row) {
    $result .= $row[$i] != 'Q' ? $row[$i] : ' ';
  }
}

print_r($answer);