#include<iostream>
#include<string>
#include<map>
#include<vector>
#include<list>
#include<queue>
#include<stack>
#include<deque>
#include<set>
#include<bitset>
#include<functional>
#include<utility>
#include<iterator>
#include<algorithm>
#include<sstream>
#include<fstream>
#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<ctime>
#include<cstring>
#include<iomanip>
using namespace std;
#define len(val) static_cast<int>(val.size())
#define rep(i, N) for(int i=0; i<N; i++)
typedef long long ll;
typedef pair<int, int> P;

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

    int n, k;
    cin >> n >> k;
    vector<int> s;
    for(int i=1; i<n; i++){
        if(n%i == 0) s.push_back(i);
    }
    int res = 1;
    for(int i=len(s)-1; i>=0; i--){
        int tmp = n/s[i];
        if(tmp >= k || tmp <= 2){
            res = max(res, s[i]);
        }
    }
    cout << res << endl;
}