#include <iostream>
#include <atcoder/lazysegtree>

using namespace std;
using namespace atcoder;
typedef int ll;

//range chmin range min
ll inf = 1000000000;
struct S{ll x;};
struct F{ll x;};
S op(S l,S r){return S{min(l.x,r.x)};}
S e(){return S{inf};}
S mapping(F l,S r){return S{min(l.x,r.x)};}
F compo(F l,F r){return F{min(l.x,r.x)};}
F id(){return F{inf};}

ll a[300010];
int main(){
    int i,j,n; cin >> n;
    for(i=0;i<n;i++) cin >> a[i];
    const int mx = 1000000;
    vector<S> v(mx + 1);
    for(i=0;i<=mx;i++) v[i] = e(); 
    lazy_segtree<S,op,e,F,mapping,compo,id> seg(v);
    long long ans = 0;
    for(i=0;i<n;i++) ans += a[i];
    seg.set(a[0],S{0});
    for(i=0;i<n;i++){
        // cout << i << endl;
        ll x = a[i];
        ll c = a[i];
        for(j=x;j<=mx;j+=x){
            // cout << j << endl;
            seg.apply(j,min((ll)mx + 1,j + x),F{seg.get(a[i]).x + c});
            c += a[i];
        }
    }
    cout << ans - seg.get(a[n - 1]).x << endl;
}