DouKaku?

class P
{
  static void Main(string[] args)
  {
    for (int i = 1, c = 0; c < 100; i++)
    {
      int[] f = F(i);
      if (f != null)
      {
        ++c;
        System.Console.WriteLine
          ("{0} = 2^{1} * 3^{2} * 5^{3}", i, f[2], f[3], f[5]);
      }
    }
  }

  static int[] F(int n)
  {
    if (n == 1) return new int[6];
    int[] a = { 2, 3, 5 };
    foreach (int d in a)
      if (n % d == 0)
      {
        int[] r = F(n / d);
        if (r == null) return null;
        ++r[d];
        return r;
      }
    return null;
  }
}