#include <iostream>
#include <iomanip>
#include <ostream>
#include <istream>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <bitset>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <deque>
#include <array>
#include <algorithm>
#include <functional>
#include <cmath>
#include <time.h>
#include <random>
#include <chrono>
#include <cassert>
#include <cstring>
#include <limits>

using namespace std;

#define int long long
#define pb push_back
#define ppb pop_back
#define all(a) (a).begin(), (a).end()
#define pii pair<int, int>
#define ld long double

istream& operator>> (istream& in, pii& b) {
    in >> b.first >> b.second;
    return in;
}

ostream& operator<< (ostream& out, const pii& b) {
    out << "{" << b.first << ", " << b.second << "}";
    return out;
}

template<typename T> ostream& operator<< (ostream& out, const vector<T>& a) {
    for (auto k : a) out << k << " ";
    return out;
}

template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}

#ifdef LOCAL
    #define dbg(x) cout << #x << " : " << (x) << endl;
    const long long INF = 1e18;
    // const long long mod = 2600000069;
    // const long long p = 10;
#else
    #define dbg(x) 57
    const long long INF = 1e18;
    // const long long mod = 2600000069;
    // const long long p = 179;
#endif

const ld PI = 4 * atan(1);

#define time clock() / (double) CLOCKS_PER_SEC

// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC target("sse,sse2,sse3,sse3,sse4")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC target("avx2")

mt19937 gen(chrono::high_resolution_clock::now().time_since_epoch().count());

void fact(int x, map<int, int>& have) {
    for (int i = 2; i * i <= x; i++) {
        while (x % i == 0) {
            have[i]++;
            x /= i;
        }
    }
    if (x > 1) {
        have[x]++;
    }
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin >> n;
    map<int, int> have;
    fact(n, have);
    int ans = 1, mx = 0;
    for (auto[p, pw] : have) {
        ans *= p;
        chkmax(mx, pw);
    }
    for (int c = 1; c <= 30; c++) {
        map<int, int> havec;
        fact(c, havec);
        bool good = 1;
        for (auto[p, pw] : have) {
            good &= ((havec[p] + 1) * ans * c >= pw);
        }
        if (good) {
            cout << ans * c << "\n";
            return 0;
        }
    }
}
/*

*/