Problem:
Score : 400 points

Problem Statement

Given are positive integers A and B.

Let us choose some number of positive common divisors of A and B.

Here, any two of the chosen divisors must be coprime.

At most, how many divisors can we choose?

Definition of common divisor

An integer d is said to be a common divisor of integers x and y when d divides both x and y.

Definition of being coprime

Integers x and y are said to be coprime when x and y have no positive common divisors other than 1.

Definition of dividing

An integer x is said to divide another integer y when there exists an integer \alpha such that y = \alpha x.

Constraints

All values in input are integers.

1 \leq A, B \leq 10^{12}

Input

Input is given from Standard Input in the following format:

A B

Output

Print the maximum number of divisors that can be chosen to satisfy the condition.

Sample Input 1

12 18

Sample Output 1

3

12 and 18 have the following positive common divisors: 1, 2, 3, and 6.

1 and 2 are coprime, 2 and 3 are coprime, and 3 and 1 are coprime, so we can choose 1, 2, and 3, which achieve the maximum result.

Sample Input 2

420 660

Sample Output 2

4

Sample Input 3

1 2019

Sample Output 3

1

1 and 2019 have no positive common divisors other than 1.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		long a = Long.parseLong(sc.next());
		long b = Long.parseLong(sc.next());
		//		int[] x = new int[n];
		//
		//		for (int i = 0; i < n; i++) {
		//			x[i] = Integer.parseInt(sc.next());
		//		}

		long gcd = gcd(a, b);
		double loot_gcd = Math.sqrt(gcd);
		int cnt = 1;

		boolean watta2 = false;
		while (gcd % 2 == 0) {
			gcd /= 2;
			watta2 = true;
		}
		if (watta2) {
			cnt++;
		}

		for (long i = 3; i <= loot_gcd; i += 2) {
			boolean watta = false;
			while (gcd % i == 0) {
				gcd /= i;
				watta = true;
			}
			if (watta) {
				//				System.out.println(i+"_");
				cnt++;
			}
		}

		if (loot_gcd <= gcd && loot_gcd != 1) {
			cnt++;
		}

		System.out.println(cnt);
		sc.close();
	}

	public static long gcd(long m, long n) {
		if (m < n)
			return gcd(n, m);
		if (n == 0)
			return m;
		return gcd(n, m % n);
	}
}