import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] arr = new int[n];
		for (int i = 0; i < n; i++) {
		    arr[i] = sc.nextInt();
		}
		Arrays.sort(arr);
		ArrayList<ArrayList<Integer>> exists = new ArrayList<>();
		exists.add(new ArrayList<>());
		exists.get(0).add(1);
		for (int i = 0; i < n; i++) {
		    boolean hit = false;
		    for (int j = exists.size() - 1; j >= 0 && !hit; j--) {
		        for (int x : exists.get(j)) {
		            if (arr[i] % x == 0) {
		                if (j == exists.size() - 1) {
		                    exists.add(new ArrayList<>());
		                }
		                exists.get(j + 1).add(arr[i]);
		                hit = true;
		                break;
		            }
		        }
		    }
		}
		System.out.println(exists.size() - 1);
	}
}