#ifdef _DEBUG
#include "MyLib.h"
#else
#define main_B main
#include "bits/stdc++.h" 
#include <regex>
#define _USE_MATH_DEFINES
#include <math.h>
#define FOR(i,s,e) for (int i = int(s); i < int(e); ++i)
#define REP(i,e) FOR(i,0,e)
#define INF (INT_MAX/2)
#define EPS (1.0e-8)
#define LINF (LONG_MAX/2)
const int MGN = 8;
const int ARY_SZ_MAX = 10000000;
using namespace std;
using ll = long long; using ull = unsigned long long;
using vi = vector<int>; using vvi = vector<vi>; using vvvi = vector<vvi>;
using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>;
using vl = vector<ll>; using vvl = vector<vl>;
using vd = vector<double>; using vs = vector<string>;
using pii = pair<int, int>; using pll = pair<ll, ll>;
// functions
struct DSU {
    int N;
    vi dt;
    DSU(int n) : N(n), dt(n, -1) {}

    int root(int v){
        if (dt[v] < 0) return v;
        return dt[v] = root(dt[v]);
    }

    bool unite(int x, int y) {
        x = root(x); y = root(y);
        if (x == y) return false;
        if (size(x) < size(y)) swap(x,y);
        dt[x] += dt[y];
        dt[y] = x;
        return true;
    }

    int size(int v) {return -dt[root(v)];}
};
#endif


int main_B() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    
    int N, P; cin >> N >> P;

    DSU un(N+1);

    FOR(i,2,N) {
        for (int j = i; j <= N; j+=i) {
            un.unite(i, j);
        }
    }

    int ans = un.size(P);

    cout << ans << endl;

    return 0;
}