#include <bits/stdc++.h>
using namespace std;
const int MAX = 18000;
vector<pair<int, int>> v(map<int, int> &mp){
  vector<pair<int, int>> ans;
  for (auto P : mp){
    ans.push_back(P);
  }
  return ans;
}
int main(){
  vector<int> f(MAX + 1, 1);
  for (int i = 2; i <= MAX; i++){
    if (f[i] == 1){
      for (int j = i; j <= MAX; j += i){
        f[j] = i;
      }
    }
  }
  int N, K;
  cin >> N >> K;
  vector<int> A(N);
  for (int i = 0; i < N; i++){
    cin >> A[i];
  }
  vector<map<int, int>> pf(N);
  for (int i = 0; i < N; i++){
    int tmp = A[i];
    while (f[tmp] != tmp){
      pf[i][f[tmp]]++;
      tmp /= f[tmp];
    }
    if (tmp > 1){
      pf[i][tmp]++;
    }
  }
  set<vector<pair<int, int>>> st;
  for (int i = 0; i < (1 << N); i++){
    if (__builtin_popcount(i) >= K){
      int sum = 0;
      map<int, int> prod;
      for (int j = 0; j < N; j++){
        if ((i >> j & 1) == 1){
          sum += A[j];
          for (auto P : pf[j]){
            prod[P.first] += P.second;
          }
        }
      }
      map<int, int> sump;
      while (f[sum] != sum){
        sump[f[sum]]++;
        sum /= f[sum];
      }
      if (sum > 1){
        sump[sum]++;
      }
      st.insert(v(prod));
      st.insert(v(sump));
    }
  }
  cout << st.size() << endl;
}