#include <iostream>
using namespace std;
int main() {
    int n , k;
    cin >> n >> k;
    int ans = 1;
    for (int i = 2; i < n; i++) {
        if (n % i == 0) ans = max(ans , max(i , n/i));
    }
    cout << ans << endl;
    return 0;
}