source_code: import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.Arrays;
  import java.io.BufferedReader;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.util.StringTokenizer;
  import java.util.HashSet;
  import java.io.InputStream;
  
  /**
   * Built using CHelper plug-in
   * Actual solution is at the top
   * @author sheep
   */
  public class Main {
  	public static void main(String[] args) {
  		InputStream inputStream = System.in;
  		OutputStream outputStream = System.out;
  		InputReader in = new InputReader(inputStream);
  		PrintWriter out = new PrintWriter(outputStream);
  		TaskA solver = new TaskA();
  		solver.solve(1, in, out);
  		out.close();
  	}
  }
  
  class TaskA {
      public void solve(int testNumber, InputReader in, PrintWriter out) {
          int n = in.nextInt();
          int k = in.nextInt();
          HashSet<Integer> set = new HashSet<Integer>();
          int a[] = new int[n];
          for (int i = 0; i < n; ++i) {
              a[i] = in.nextInt();
          }
          Arrays.sort(a);
          int ans = 0;
          int ptr = -1;
          boolean chosen[] = new boolean[n];
          for (int i = 0; i < n; ++i) {
              while (ptr + 1 < i && a[ptr + 1] * (long)k <= a[i]) {
                  ++ptr;
              }
  
              if (a[i] % k != 0 || ptr == -1 || !chosen[ptr] || a[ptr] * (long)k != a[i]) {
                  ++ans;
                  chosen[i] = true;
              }
          }
  
          out.println(ans);
      }
  }
  
  class InputReader {
      BufferedReader reader;
      StringTokenizer tokenizer;
  
      public InputReader(InputStream stream) {
          reader = new BufferedReader(new InputStreamReader(stream));
          tokenizer = null;
      }
  
      public String next() {
          while (tokenizer == null || !tokenizer.hasMoreTokens()) {
              try {
                  tokenizer = new StringTokenizer(reader.readLine());
              } catch (Exception e) {
                  throw new UnknownError();
              }
          }
          return tokenizer.nextToken();
      }
  
      public int nextInt() {
          return Integer.parseInt(next());
      }
  
      }
  