#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <map>
#include <queue>
#include <iomanip>
#include <set>
#include <tuple>
#define mkp make_pair
#define mkt make_tuple
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define all(v) v.begin(),v.end()
using namespace std;
typedef long long ll;
const ll MOD=1e9+7;
template<class T> void chmin(T &a,const T &b){if(a>b) a=b;}
template<class T> void chmax(T &a,const T &b){if(a<b) a=b;}

const int L=1e3;
const ll INF=1e9;

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);

  int N,K;
  cin>>N>>K;
  vector<int> A(N);
  rep(i,N) cin>>A[i];

  sort(all(A));

  vector<int> isPrime(L+1,1);
  isPrime[0]=0;isPrime[1]=0;
  for(int i=2;i<=L;i++){
    if(isPrime[i]==0) continue;
    for(int j=2;i*j<=L;j++) isPrime[i*j]=0;
  }

  vector<int> primes;
  for(int i=2;i<=L;i++) if(isPrime[i]) primes.push_back(i);
  int V=primes.size();

  vector<vector<int>> pcnt(N);
  rep(i,N){
    rep(j,V){
      int value=A[i];
      while(value%primes[i]==0){
        pcnt[i].push_back(primes[i]);
        value/=primes[i];
      }
    }
  }

  map<int,int> mp;
  map<vector<int>,int> mulmp;

  for(int bit=0;bit<(1<<N);bit++){
    int sz=__builtin_popcount(bit);
    if(sz<K) continue;

    vector<int> v;
    rep(i,N) if(bit>>i&1) v.push_back(i);

    int sum=0;
    for(auto i:v) sum+=A[i];
    mp[sum]=1;

    ll value=1;
    bool over=false;
    for(auto i:v){
      value*=A[i];
      if(value>INF){
        over=true;
        break;
      }
    }
    if(over==false){
      mp[value]=1;
      continue;
    }

    vector<int> ps;
    for(auto i:v){
      for(auto n:pcnt[i]) ps.push_back(n);
    }
    sort(all(ps));
    mulmp[ps]=1;
  }

  int ans=mp.size()+mulmp.size();
  cout<<ans<<endl;

  return 0;
}