source_code: import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.Arrays;
  import java.util.Scanner;
  import java.util.StringTokenizer;
  
  
  public class C {
  	
  	public static final long MAX = 1000000000L;
  	
  	public static void main(String[] args) throws IOException{
  		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  		
  		StringTokenizer tok1 = new StringTokenizer(br.readLine());
  		final int n = Integer.parseInt(tok1.nextToken());
  		final long k = Integer.parseInt(tok1.nextToken());
  		
  		StringTokenizer tok2 = new StringTokenizer(br.readLine());
  		int[] array = new int[n];
  		for(int i = 0; i < n; i++){
  			array[i] = Integer.parseInt(tok2.nextToken());
  		}
  		
  		int size = n;
  		
  		Arrays.sort(array);
  		
  		boolean[] skip = new boolean[n];
  		for(int i = 0; i < n; i++){
  			if(skip[i]){
  				size--;
  				continue;
  			}
  			
  			long input = array[i];
  			input *= k;
  			if(input > MAX){
  				continue;
  			}
  			
  			
  			final int pos = Arrays.binarySearch(array, (int)(input));
  			if(pos >= 0 && !skip[pos]){
  				skip[pos] = true;
  			}
  		}
  		
  		System.out.println(size);
  	}
  }
  