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();
        ArrayList<HashSet<Integer>> results = new ArrayList<>();
        results.add(new HashSet<>());
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            ArrayList<Integer> unit = new ArrayList<>();
            for (int j = 1; j <= Math.sqrt(x); j++) {
                if (x % j == 0) {
                    unit.add(j);
                    if (j * j < x) {
                        unit.add(x / j);
                    }
                }
            }
            boolean enable = false;
            for (int j = results.size() - 1; j >= 0 && !enable; j--) {
                for (int y : unit) {
                    if (results.get(j).contains(y)) {
                        if (j == results.size() - 1) {
                            results.add(new HashSet<>());
                        }
                        results.get(j + 1).add(x);
                        enable = true;
                        break;
                    }
                }
            }
            if (!enable) {
                results.get(0).add(x);
            }
        }
        System.out.println(results.size());
    }
}
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();
    }
    
}