import java.io.*;
import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[] values = new int[n];
        for (int i = 0; i < n; i++) {
            values[i] = sc.nextInt();
        }
        Arrays.sort(values);
        HashMap<Integer, ArrayList<Integer>> idxes = new HashMap<>();
        for (int i = 0; i < n; i++) {
            for (int j = 1; j <= Math.sqrt(values[i]); j++) {
                if (values[i] % j == 0) {
                    if (!idxes.containsKey(j)) {
                        idxes.put(j, new ArrayList<>());
                    }
                    idxes.get(j).add(i);
                    if (j * j < values[i]) {
                        if (!idxes.containsKey(values[i] / j)) {
                            idxes.put(values[i] / j, new ArrayList<>());
                        }
                        idxes.get(values[i] / j).add(i);
                    }
                }
            }
        }
        PriorityQueue<Bridge> queue = new PriorityQueue<>();
        for (int x : idxes.keySet()) {
            long base = values[idxes.get(x).get(0)] / x;
            for (int i = 1; i < idxes.get(x).size(); i++) {
                queue.add(new Bridge(idxes.get(x).get(0), idxes.get(x).get(i), base * values[idxes.get(x).get(i)]));
            }
        }
        UnionFindTree uft = new UnionFindTree(n);
        long ans = 0;
        while (queue.size() > 0) {
            Bridge b = queue.poll();
            if (!uft.same(b)) {
                uft.unite(b);
                ans += b.value;
            }
        }
        System.out.println(ans);
    }
    
    static class Bridge implements Comparable<Bridge> {
        int left;
        int right;
        long value;
        
        public Bridge(int left, int right, long value) {
            this.left = left;
            this.right = right;
            this.value = value;
        }
        
        public int compareTo(Bridge another) {
            if (value == another.value) {
                return 0;
            } else if (value < another.value) {
                return -1;
            } else {
                return 1;
            }
        }
    }
    
    static class UnionFindTree {
        int[] parents;
        
        public UnionFindTree(int size) {
            parents = new int[size];
            for (int i = 0; i < size; i++) {
                parents[i] = i;
            }
        }
        
        public int find(int x) {
            if (x == parents[x]) {
                return x;
            } else {
                return parents[x] = find(parents[x]);
            }
        }
        
        public boolean same(int x, int y) {
            return find(x) == find(y);
        }
        
        public boolean same(Bridge x) {
            return same(x.left, x.right);
        }
        
        public void unite(int x, int y) {
            parents[find(x)] = find(y);
        }
        
        public void unite(Bridge b) {
            unite(b.left, b.right);
        }
    }
}

class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}