#include <bits/stdc++.h>
#include<atcoder/all>
using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i = 0; i < n; i++)cin >> a[i];

    vector<vector<int>> div(n);
    for(int i = 0; i < n; i++){
        for(int x = 1; x * x <= a[i]; x++){
            if(a[i] % x != 0)continue;
            if(x*x != a[i])div[i].push_back(a[i]/x);
            div[i].push_back(x);
        }
    }

    int ok = 0, ng = n+1;
    while(ng - ok > 1){
        int mid = (ok + ng) / 2;
        atcoder::mf_graph<int> G(n+mid+2);
        for(int i = 0; i < mid; i++){
            G.add_edge(n+mid, n+i, 1);
        }
        for(int i = 0; i < n; i++){
            G.add_edge(i, n+mid+1, 1);
            for(auto x : div[i])if(x <= mid){
                G.add_edge(n+x-1, i, 1);
            }
        }
        if(G.flow(n+mid, n+mid+1) == mid)ok = mid;
        else ng = mid;
    }
    
    cout << ok << endl;
}