#include <iostream>

inline int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }
inline int lcm(int a, int b) { return a / gcd(a, b) * b; }

int main(void) {
  int ans = 1;
  for (int i = 1; i <= 20; ++i) {
    ans = lcm(ans, i);
  }
  std::cout << ans << std::endl;
  return 0;
}