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

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        long x = sc.nextLong();
        long a = sc.nextLong();
        HashMap<Long, Integer> xMap = new HashMap<>();
        for (long i = 2; i <= Math.sqrt(x); i++) {
            while (x % i == 0) {
                xMap.put(i, xMap.getOrDefault(i, 0) + 1);
                x /= i;
            }
        }
        if (x > 1) {
            xMap.put(x, xMap.getOrDefault(x, 0) + 1);
        }
        long y = sc.nextLong();
        long b = sc.nextLong();
        for (long i = 2; i <= Math.sqrt(y); i++) {
            int count = 0;
            while (y % i == 0) {
                count++;
                y /= i;
            }
            if (count == 0) {
                continue;
            }
            if (xMap.getOrDefault(i, 0) * a < count * b) {
                System.out.println("No");
                return;
            }
        }
        if (y > 1) {
            if (xMap.getOrDefault(y, 0) * a < b) {
                System.out.println("No");
                return;
            }
        }
        System.out.println("Yes");
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String nextLine() throws Exception {
        return br.readLine();
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}