source_code: import java.io.*;
  import java.util.Arrays;
  import java.util.StringTokenizer;
  import java.util.TreeSet;
  
  public class A {
  
      final boolean ONLINE_JUDGE = System.getProperty("ONLINE_JUDGE") != null;
      BufferedReader in;
      PrintWriter out;
      StringTokenizer tok = new StringTokenizer("");
  
      void solve() throws IOException {
  		int n = readInt();
  		long k = readInt();
  		Long[] a = new Long[n];
  		for(int i = 0; i < n; i++){
  			a[i] = readLong();
  		}
  		Arrays.sort(a);
  		TreeSet<Long> set = new TreeSet<Long>();
  		for(int i = 0; i < n; i++){
  			set.add(a[i]);
  		}
  		if(k == 1) {
  			out.println(n);
  			return;
  		}
  		int res = 0;
  		TreeSet<Long> used = new TreeSet<Long>();
  		for(Long cur: set){
  			if(!used.contains(cur)){
  				int num = 1;
  				used.add(cur);
  				Long temp = cur * 1;
  				
  				while(true){
  					if(set.contains(k*temp)){
  						num++;
  						used.add(k*temp);
  						temp *= k;
  					}
  					else{
  						res += (num+1)/2;
  						break;
  					}
  				}
  			}
  		}
  		out.println(res);
  
  
      }
  
      void init() throws FileNotFoundException {
          if (ONLINE_JUDGE) {
              in = new BufferedReader(new InputStreamReader(System.in));
              out = new PrintWriter(System.out);
          } else {
              in = new BufferedReader(new FileReader("input.txt"));
              out = new PrintWriter("output.txt");
          }
      }
  
      String readString() throws IOException {
          while (!tok.hasMoreTokens()) {
              tok = new StringTokenizer(in.readLine());
          }
          return tok.nextToken();
      }
  
      int readInt() throws IOException {
          return Integer.parseInt(readString());
      }
  
      long readLong() throws IOException {
          return Long.parseLong(readString());
      }
  
      double readDouble() throws IOException {
          return Double.parseDouble(readString());
      }
  
      int[] readArr(int n) throws IOException {
          int[] res = new int[n];
          for (int i = 0; i < n; i++) {
              res[i] = readInt();
          }
          return res;
      }
  
      long[] readArrL(int n) throws IOException {
          long[] res = new long[n];
          for (int i = 0; i < n; i++) {
              res[i] = readLong();
          }
          return res;
      }
  
      public static void main(String[] args) {
          new A().run();
      }
  
      public void run() {
          try {
              long t1 = System.currentTimeMillis();
              init();
              solve();
              out.close();
              long t2 = System.currentTimeMillis();
              System.err.println("Time = " + (t2 - t1));
          } catch (Exception e) {
              e.printStackTrace(System.err);
              System.exit(-1);
          }
      }
  }