#include<bits/stdc++.h>
using namespace std;
#define ALL(x) begin(x),end(x)
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define mod 1000000007
using ll=long long;
const int INF=1000000000;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0},dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}

struct IOSetup{
    IOSetup(){
        cin.tie(0);
        ios::sync_with_stdio(0);
        cout<<fixed<<setprecision(12);
    }
} iosetup;
 
template<typename T>
ostream &operator<<(ostream &os,const vector<T>&v){
    for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==(int)v.size()?"":" ");
    return os;
}
template<typename T>
istream &operator>>(istream &is,vector<T>&v){
    for(T &x:v)is>>x;
    return is;
}
bool isPrime(ll num){
    if(num<2)           return false;
    else if(num==2)     return true;
    else if(num%2==0)   return false;
    for(ll i=3;i*i<=num;i+=2) if(num%i==0) return false;
    return true;
}



signed main(){
    ll n;cin>>n;
    vector<ll> p;
    rep(i,n+1)if(isPrime(i)) p.push_back(i);
    int m=(int)p.size();
    chmin(m,12);
    int dp[1<<m];
    rep(i,1<<m)dp[i]=0;
    for(int num=2;num<=n;num++){
        int mask=0;
        rep(i,m) if(num%p[i]==0) mask|=(1<<i);

        rep(bit,1<<m){
            if((bit&mask)==0) chmax(dp[bit|mask],dp[bit]+num);
        }
    }
    cout<<*max_element(dp,dp+(1<<m))<<endl;
    return 0;
}