source_code: import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  public class ProblemA {
  	
  	public static void main(String[] args) throws IOException {
  		BufferedReader s = new BufferedReader(new InputStreamReader(System.in));
  		PrintWriter out = new PrintWriter(System.out);
  		
  		String[] data = s.readLine().split(" ");
  		int n = Integer.valueOf(data[0]);
  		int k = Integer.valueOf(data[1]);
  		
  		
  		long[] a = new long[n];
  		String[] ai = s.readLine().split(" ");
  		for (int i = 0 ; i < n ; i++) {
  			a[i] = Integer.valueOf(ai[i]);
  		}
  		for (int i = 0 ; i < n ; i++) {
  			int tm = (int)(Math.random() * n);
  			long tmp = a[tm];
  			a[tm] = a[i];
  			a[i] = tmp;
  		}
  		Arrays.sort(a);
  
  		Set<Long> invalid = new HashSet<Long>();
  		int cnt = 0;
  		for (int i = 0 ; i < n ; i++) {
  			if (!invalid.contains(a[i])) {
  				cnt++;
  				invalid.add(a[i] * k);
  			}
  		}
  		out.println(cnt);
  		out.flush();
  	}
  
  
  	public static void debug(Object... os){
  		System.err.println(Arrays.deepToString(os));
  	}
  }