#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n, ans = 0;
  long long k;
  cin >> n >> k;
  map<long long, int> mp;
  long long arr[n];
  for (int i = 0; i < n; i++) cin >> arr[i];
  sort(arr, arr + n);
  for (int i = 0; i < n; i++) {
    if (arr[i] % k != 0)
      ans++, mp[arr[i]] = 1;
    else {
      if (!mp[arr[i] / k]) {
        ans++;
        mp[arr[i]] = 1;
      }
    }
  }
  cout << ans;
  return 0;
}
