#include <bits/stdc++.h>
using namespace std;

#define int long long
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

signed main()
{
  int n, k;
  cin >> n >> k;

  if(k == 1){
    cout << n-1 << endl;
    return 0;
  }

  vi cnt(n+1);
  repi(i, 2, n+1){
    if(cnt[i] != 0) continue;
    repi(j, 2, n/i+1){
      cnt[i*j]++;
    }
  }

  int ans = 0;
  rep(i, n+1){
    if(cnt[i] >= k) ans++;
  }

  cout << ans << endl;

  return 0;
}