using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Security.Cryptography;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList;
        Array.Sort(a);
        var dic = new Dictionary<int, int>();
        dic[a[0]] = 1;
        for (var i = 1; i < n; ++i)
        {
            var ndic = new Dictionary<int, int>();
            ndic[a[i]] = 1;
            foreach (var kv in dic)
            {
                if (ndic.ContainsKey(kv.Key)) ndic[kv.Key] += kv.Value;
                else ndic[kv.Key] = kv.Value;
                var gcd = GCD(kv.Key, a[i]);
                if (ndic.ContainsKey(gcd)) ndic[gcd] += kv.Value;
                else ndic[gcd] = kv.Value;
            }
            dic = ndic;
        }
        if (dic.ContainsKey(1)) WriteLine(dic[1]);
        else WriteLine(0);
    }
    static int GCD(int a, int b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
}