/*
#include<kyopro/master>
void self::main(){
  LL(N,X);
  
  DsuPlain uf(N+1);
  fo(i,2,N+1){
    fo(j,i*2,N+1,i){
      uf.merge(i,j);
    }
  }
  
  pp(uf.size(X));
}
*/

#include<bits/stdc++.h>
using namespace std;
namespace self{void main();void sub();template<ostream&o>void pp(const auto&...a);void epp(const auto&...a);}
int main(){cin.tie(nullptr)->sync_with_stdio(0);cout<<fixed<<setprecision(15);self::main();}
#define RD(T,...) T __VA_ARGS__;lin(__VA_ARGS__)
#define LL(...) RD(ll,__VA_ARGS__)
#define fo(i,...) for(auto[i,i##stop,i##step]=for_range<ll>(0,__VA_ARGS__);i<i##stop;i+=i##step)
namespace self{
using ll=long long;
template<class T>constexpr auto for_range(T s,T a,T b,T c=1){return array{a-s,b,(1-s*2)*c};}
void lin(auto&...a){(cin>>...>>a);}
template<class...A>using pack_back_t=tuple_element_t<sizeof...(A)-1,tuple<A...>>;
}
namespace self{
template<class V>struct vec;
template<int D,class T>struct hvec_helper{using type=vec<typename hvec_helper<D-1,T>::type>;};
template<class T>struct hvec_helper<0,T>{using type=T;};
template<int D,class T>using hvec=hvec_helper<D,T>::type;
template<class V>struct vec:vector<V>{
  using vector<V>::vector;
};
template<class...A>requires(sizeof...(A)>=2)vec(const A&...a)->vec<hvec<sizeof...(A)-2,pack_back_t<A...>>>;
}
namespace self{
class DsuPlain{
public:
  ll n_;
  vec<int>par_or_size_;
  DsuPlain(ll n):n_(n),par_or_size_(n,-1){}
  auto merge(ll a,ll b){
    ll x=leader(a),y=leader(b);
    if(x==y)return x;
    if(-par_or_size_[x]<-par_or_size_[y])swap(x,y),swap(a,b);

    par_or_size_[x]+=par_or_size_[y];
    par_or_size_[y]=x;
    return x;
  }
  ll leader(ll a){
    if(par_or_size_[a]<0)return a;
    return par_or_size_[a]=leader(par_or_size_[a]);
  }
  ll size(ll a){return-par_or_size_[leader(a)];}
};
}
template<ostream&o=cout>void self::pp(const auto&...a){const char*c="";((o<<c<<a,c=" "),...);o<<'\n';}
void self::main(){
  LL(N,X);

  DsuPlain uf(N+1);
  fo(i,2,N+1){
    fo(j,i*2,N+1,i){
      uf.merge(i,j);
    }
  }

  pp(uf.size(X));
}