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

public class Main {
    static final int MAX = 100000;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        if (n == 0) {
            n = 998244353;
        }
        boolean[] isNotPrimes = new boolean[100000];
        ArrayDeque<Integer> primes = new ArrayDeque<>();
        for (int i = 2; i < isNotPrimes.length; i++) {
            if (!isNotPrimes[i]) {
                primes.add(i);
                for (int j = 2; j * i < isNotPrimes.length; j++) {
                    isNotPrimes[j * i] = true;
                }
            }
        }
        ArrayList<Integer> idxes = new ArrayList<>();
        HashSet<Integer> ans = new HashSet<>();
        for (int i = 0; i < 30; i++) {
            if ((n & (1 << i)) > 0) {
                idxes.add(i);
                ans.add(primes.pollLast());
            }
        }
        ArrayList<Integer> values = new ArrayList<>();
        for (int i = idxes.size() - 1; i >= 0; i--) {
            values.add(primes.pollFirst());
        }
        ArrayList<Integer> currents = new ArrayList<>();
        currents.addAll(primes);
        for (int i = 0; i < idxes.size(); i++) {
            int x = idxes.get(i);
            int y = values.get(i);
            if (x > 0) {
                ans.add(y);
            }
            int base = x * x;
            int idx = 0;
            for (int j = 1; j < x; j++) {
                if (base > MAX) {
                    while (ans.contains(y * currents.get(idx))) {
                        idx++;
                    }
                    ans.add(y * currents.get(idx));
                } else {
                    ans.add(base);
                    base *= x;
                }
            }
        }
        System.out.println(ans.size());
        StringBuilder sb = new StringBuilder();
        boolean isFirst = true;
        for (int x : ans) {
            if (!isFirst) {
                sb.append(" ");
            }
            isFirst = false;
            sb.append(x);
        }
        System.out.println(sb);
    }
}
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();
    }
    
}