#include <bits/stdc++.h>
#include <cstdint>
#include <sys/time.h>

typedef std::int_fast32_t  s32;
typedef std::uint_fast32_t u32;
typedef std::int_fast64_t  s64;
typedef std::uint_fast64_t u64;

const unsigned long mod = 1000000007;
const double EPS = 0.00000001;
const int INF = (1 << 30);

template<typename T>
T pow_(T x, long n) {
  T p = x;
  T res = 1;

  while( n != 0 ) {
    if( (n & 0x01) != 0 ) {
      res *= p;
    }
    p *= p;
    n >>= 1;
  }

  return res;
}

long calc2(long p, long n) {
  long res = 0;
  for(int i = 0; i <= n; ++i) {
    res += pow_(p, i);
  }
  return res;
}

long calc(long x) {
  long res = 1;
  long limit = sqrt(x) + 1;

  for(long i = 2; i <= limit; ++i) {
    int count = 0;
    while( x % i == 0 ) {
      count += 1;
      x /= i;
    }
    if( count != 0 ) {
      res *= calc2(i, count);
    }
  }
  if( x != 0 and x != 1 ) {
    res *= calc2(x, 1);
  }
  
  return res;
}

int main() {
  
  long n;
  std::cin >> n;
  
  if( n % 2 == 0 ) {
    std::cout << calc(n/2) << std::endl;
  }
  else {
    std::cout << calc(n) << std::endl;
  }

  return 0;
}