#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

map<int,int> pfact(int n) {
  map<int, int> ret;
  for(int i=2; i*i<=n; i++) {
    while(n%i == 0) {
      ++ret[i]; n/=i;
    }
  }
  if(n!=1) ret[n] = 1;
  return ret;
}

int main() {
  
  int N, K; cin >> N >> K;
  
  K = min(N, K)-1;
  map<int, int> mp = pfact(N);
  long long ans = 1;
  bool thru = 0;
  for(map<int,int>::iterator it=mp.begin();it!=mp.end();it++) {
    while(it->second > 0) {
      if(!thru) { it->second--; thru = 1; }
      else { ans *= it->first; it->second --; }
    }
  }
  
  cout << ans << endl;
  
  return 0;
}