#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin>>t;
while(t--){
int n,k;
cin>>n>>k;
vector<int>v;
for(int i=1;i*i<=n;i++){
if(n%i==0){
v.push_back(i);
v.push_back(n/i);
}
}
int ans=n;
for(int i=0;i<v.size();i++){
if(v[i]<=k){
ans=min(ans,n/v[i]);
}
}
cout<<ans<<endl;
}
return 0;
}
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