source_code: import java.io.DataInputStream;
  import java.io.InputStream;
  import java.util.Arrays;
  import java.util.TreeSet;
  
  public class Main{
  
  	
  	public static void main(String[] args) throws Exception {
  		Parserdoubt3 s = new Parserdoubt3(System.in);
  		int n = s.nextInt();
  		long k = s.nextInt();
  		Long a[] = new Long[n];
  		TreeSet<Long> tree = new TreeSet<Long>();
  		for (int i = 0; i < a.length; i++) {
  			a[i] = s.nextLong();
  			tree.add(a[i]);
  		}
  		Arrays.sort(a);
  		
  		int ans = 0;
  		
  		for (int i = 0; i < a.length; i++) {
  			if(tree.contains(a[i])){ 
  				ans++;
  				long next = a[i] * k;
  				if(tree.contains(next)) tree.remove(next);
  			}
  		}
  		System.out.println(ans);
  	}
  
  }
  
  class Parserdoubt3 {
  	final private int BUFFER_SIZE = 1 << 17;
  
  	private DataInputStream din;
  	private byte[] buffer;
  	private int bufferPointer, bytesRead;
  
  	public Parserdoubt3(InputStream in) {
  		din = new DataInputStream(in);
  		buffer = new byte[BUFFER_SIZE];
  		bufferPointer = bytesRead = 0;
  	}
  
  	public String nextString() throws Exception {
  		StringBuffer sb = new StringBuffer("");
  		byte c = read();
  		while (c <= ' ')
  			c = read();
  		do {
  			sb.append((char) c);
  			c = read();
  		} while (c > ' ');
  		return sb.toString();
  	}
  
  	public char nextChar() throws Exception {
  		byte c = read();
  		while (c <= ' ')
  			c = read();
  		return (char) c;
  	}
  
  	public int nextInt() throws Exception {
  		int ret = 0;
  		byte c = read();
  		while (c <= ' ')
  			c = read();
  		boolean neg = c == '-';
  		if (neg)
  			c = read();
  		do {
  			ret = ret * 10 + c - '0';
  			c = read();
  		} while (c > ' ');
  		if (neg)
  			return -ret;
  		return ret;
  	}
  
  	public long nextLong() throws Exception {
  		long ret = 0;
  		byte c = read();
  		while (c <= ' ')
  			c = read();
  		boolean neg = c == '-';
  		if (neg)
  			c = read();
  		do {
  			ret = ret * 10 + c - '0';
  			c = read();
  		} while (c > ' ');
  		if (neg)
  			return -ret;
  		return ret;
  	}
  
  	private void fillBuffer() throws Exception {
  		bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE);
  		if (bytesRead == -1)
  			buffer[0] = -1;
  	}
  
  	private byte read() throws Exception {
  		if (bufferPointer == bytesRead)
  			fillBuffer();
  		return buffer[bufferPointer++];
  	}
  }