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

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        String[] first = br.readLine().split(" ", n);
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = Integer.parseInt(first[i]);
        }
        System.out.println(getCount(0, arr, -1));
    }
    
    static long getCount(int idx, int[] arr, int value) {
        if (idx >= arr.length) {
            return 0;
        }
        long count = getCount(idx + 1, arr, value);
        if (value == -1) {
            value = arr[idx];
        } else {
            value = gcd(value, arr[idx]);
        }
        if (value == 1) {
            count += (long)(Math.pow(2, arr.length - idx - 1));
        } else {
            count += getCount(idx + 1, arr, value);
        }
        return count;
    }
    
    static int gcd(int x, int y) {
        if (x % y == 0) {
            return y;
        } else {
            return gcd(y, x % y);
        }
    }
}