/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;
import java.math.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int a = sc.nextInt();
		int b = sc.nextInt();
		int p = sc.nextInt();
		int q = sc.nextInt();
		
		long ans = 0;
		
		int x = n / a;
		int y = n / b;
		int z = 0;
		
		
		long nr = a * b;
		int j = 1;
		
		while (nr <= n && nr > 0) {
			z++;
			j++;
			nr = a * b * j;
		}
		
		BigInteger sum = BigInteger.valueOf(0);
		
		if (a == b) {
			sum = sum.add(BigInteger.valueOf(Math.max(p, q) * x));
		}
		else if (p > q) {
			sum = sum.add(BigInteger.valueOf(x * p));
			sum = sum.add(BigInteger.valueOf((y - z) * q));
		}
		else if (p <= q) {
			sum = sum.add(BigInteger.valueOf((x-z) * p));
			sum = sum.add(BigInteger.valueOf(y * q));
		}
		
		System.out.println(sum);
	}
}