/*-----------------------------
Author : TgX.2
11Ti - K28 - CHV
-----------------------------*/
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i += 1)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; i -= 1)
#define FORC(i, a, b, c) for (int i = (a), _b = (b), _c = (c); i <= _b; i += _c)
#define fi first
#define se second
#define pb push_back
#define len(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()
#define _ << " " <<
#define __ << "\n"
#define ______________TgX______________ main()
// #define int long long
#define intmax 1e9
#define intmin -1e9
#define llongmax 1e18
#define llongmin -1e18
#define memo(a, val) memset((a), (val), sizeof((a)))
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
template<typename T1, typename T2>
bool mini(T1 &a, T2 b)
{if (a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2>
bool maxi(T1 &a, T2 b)
{if (a < b) a = b; else return 0; return 1;}
/*-----------------------------*/
const int maxn = 1e5 + 7;
const int maxval = 1e7 + 7;
int n, a[maxn], pos[maxval];
vector<pair<int, int>> candidate[maxval];
int par[maxn], child[maxn];
void init() {
FOR(i, 1, n) {
par[i] = i;
child[i] = 1;
}
}
int find(int u) {
return (u == par[u] ? u : par[u] = find(par[u]));
}
bool merge(int u, int v) {
int a = find(u), b = find(v);
if (a == b) return 1;
if (child[a] > child[b]) swap(a, b);
par[b] = a;
child[a] += child[b];
return 0;
}
vector<int> va;
void process() {
cin >> n;
FOR(i, 1, n) {
int x; cin >> x;
va.pb(x);
}
sort(all(va));
va.erase(unique(all(va)), va.end());
// for(const int &val : va)
// cout << val __ ;
n = 0;
for(const int &val : va)
a[++n] = val;
init();
FOR(i, 1, n) pos[a[i]] = i;
FORD(i, a[n], 1) if (pos[i] == 0) pos[i] = pos[i + 1];
FOR(i, 2, n)
candidate[a[i] % a[i - 1]].pb({i, i - 1});
FOR(i, 1, n) {
int cur = a[i] + a[i];
while(cur <= a[n]) {
int posi = pos[cur];
candidate[a[posi] % a[i]].pb({i, posi});
cur = a[posi] / a[i] * a[i];
cur += a[i];
}
}
// FOR(i, 0, a[n]) {
// cout << i << " : " __ ;
// for(const pair<int, int> &val : candidate[i])
// cout << val.fi _ val.se __ ;
// cout << "---------\n";
// }
long long ans = 0;
FOR(i, 0, a[n]) {
for(const pair<int, int> &val : candidate[i])
if (!merge(val.fi, val.se))
ans += i;
}
cout << ans;
}
/*-----------------------------*/
______________TgX______________ {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
if (fopen("temp.inp", "r")) {
freopen("temp.inp", "r", stdin);
freopen("temp.out", "w", stdout);
}
process();
}
/*==============================+
|INPUT |
--------------------------------|
================================+
|OUTPUT |
--------------------------------|
===============================*/
