class PrimeFactors {
  List<int> factors(int number) {
    List<int> primeFactors = [];
    int currentFactor = 2;
    while (number != 1) {
      if (number % currentFactor == 0) {
        number ~/= currentFactor;
        primeFactors.add(currentFactor);
      } else {
        currentFactor++;
      }
    }
    return primeFactors;
  }
}