import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.*;


public class Solution {

    private static ArrayList<Integer> factor = new ArrayList<>();
    private static TreeMap<Long,Long> memo = new TreeMap<>();

    static long longest(long a,int ind) {

        if (a == 1) {
            return 1;
        }

        if (memo.containsKey(a)) {
            return memo.get(a);
        }

        long max = longest(1, ind) + a;
        for(int i = ind;i < factor.size();i++) {
            if (factor.get(i) > a) break;
            if (a % factor.get(i) == 0) {
                max = Math.max(max,longest(a / factor.get(i), i) + a);
                break;
            }
        }
        memo.put(a, max);
        return max;
    }


    static long longestSequence(long[] a) {
        for(int i = 2;i <= 1000000;i++) {
            boolean isP = true;
            for(int j = 2;j * j <= i;j++) {
                if (i % j == 0) {
                    isP = false;
                    break;
                }
            }

            if (isP) {
                factor.add(i);
            }
        }

        long ret = 0;
        for(long v : a) {
            ret += longest(v, 0);
        }

        return ret;
    }

    private void solve() {
        int n = nextInt();
        long[] a = new long[n];
        for(int i = 0;i < n;i++) {
            a[i] = nextLong();
        }
        long result = longestSequence(a);
        out.println(result);
    }

    public static void main(String[] args) {
        out.flush();
        new Solution().solve();
        out.close();
    }

    /* Input */
    private static final InputStream in = System.in;
    private static final PrintWriter out = new PrintWriter(System.out);
    private final byte[] buffer = new byte[2048];
    private int p = 0;
    private int buflen = 0;

    private boolean hasNextByte() {
        if (p < buflen)
            return true;
        p = 0;
        try {
            buflen = in.read(buffer);
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (buflen <= 0)
            return false;
        return true;
    }

    public boolean hasNext() {
        while (hasNextByte() && !isPrint(buffer[p])) {
            p++;
        }
        return hasNextByte();
    }

    private boolean isPrint(int ch) {
        if (ch >= '!' && ch <= '~')
            return true;
        return false;
    }

    private int nextByte() {
        if (!hasNextByte())
            return -1;
        return buffer[p++];
    }

    public String next() {
        if (!hasNext())
            throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = -1;
        while (isPrint((b = nextByte()))) {
            sb.appendCodePoint(b);
        }
        return sb.toString();
    }

    public int nextInt() {
        return Integer.parseInt(next());
    }

    public long nextLong() {
        return Long.parseLong(next());
    }

    public double nextDouble() {
        return Double.parseDouble(next());
    }
}