Go: package main

import "fmt"

func gcd(x, y int64) int64 {
	for y != 0 {
		r := x % y
		x = y
		y = r
	}
	return x
}

func lcm(x, y int64) int64 {
	return x / gcd(x, y) * y
}

func main() {
	for {
		var a, b int64

		fmt.Scanf("%d %d", &a, &b)

		if a == 0 && b == 0 {
			break
		}

		fmt.Printf("%d %d\n", gcd(a, b), lcm(a, b))
	}
}

C++: #include<iostream>
#include<string>
#include<cstdio>
#include<algorithm>
using namespace std;
int main(){
    long long i,a,b,c;
    while(cin>>a>>b){
        if(a==b){
            cout<<a<<" "<<a<<endl;
        }
        else{
        if(a<b){
            i=b-a;
        }
        else{
            i=a-b;
        }
    for( long long j=i;j>0;i--){
        if(a%i==0 && b%i==0){
            c=i;
            break;
        }
    }
    cout<<c<<" "<<a*b/c<<endl;
        }
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main() {
    int a,b,big,small,r;

    while(1){
        cin >> a >> b;
        if(cin.eof()){
            break;
        }
        
        if(a > b){
            big = a;
            small = b;
        }
        else {
            big = b;
            small = a;
        }
        
        r = big % small;
        while(r != 0){
            big = small;
            small = r;
            r = big % small;
        }
        
    }
    
    cout << small << ' ' << (a / small) * (b / small) * small << endl; 

    return 0;
}

C++: #include <algorithm>
#include <iostream>
using namespace std;
int main() {
	long long a, b;
	while (cin >> a >> b) {
		cout << __gcd(a,b) << " " << a / __gcd(a,b) * b << "\n";
	}
}

C++: #include<iostream>
using namespace std;
int main(){
    int  i,a,b,c;
    while(cin>>a>>b){
        if(a==b){
            cout<<a<<" "<<a<<endl;
        }
        else{
        if(a<b){
            i=b-a;
        }
        else{
            i=a-b;
        }
    for( int j=i;j>0;i-=2){
        if(a%i==0 && b%i==0){
            c=i;
            break;
        }
    }
    cout<<c<<" "<<a*b/c<<endl;
        }
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main()
{
	int a, b, c, r;
	int gcd, lcm;

	while (cin >> a >> b){
		if (b > a){
			c = a; 
			a = b; 
			b = c;
		}

		lcm = a * b;
		while (1){
			r = a % b;

			gcd = b;
			if (r == 0){
				break;
			}
			a = b;
			b = r;
		}

		lcm /= gcd;
		cout << gcd << " " << lcm << endl;
	}

	return 0;
}

C++: #include <iostream>
using namespace std;

int GCD(int value1,int value2){
    int large,small;
    
    if(value1>=value2){
        large=value1;
        small=value2;
    }else{
        large=value2;
        small=value1;
    }
    
    if((large%small)==0){
        return small;
    }else{
        return GCD(small,large%small);
    }
}

int main(){
    int a,b,gcd,lcm;
    while(cin>>a>>b){
        gcd=GCD(a,b);
        lcm=a/gcd*b;
        cout << gcd << " " << lcm << endl;
    }
}

C++: #include <iostream>
#include <vector>
using namespace std;

int gcd(int a,int b)
{
    int l,s,r;
    if (a<b)
    {
	l=b;
	s=a;
    } else {
	l=a;
	s=b;
    }
    while(true)
    {
	r=l%s;
	if (r == 0) break;
	l=s;
	s=r;
    }
    return s;
}

int main()
{
    int a,b;
    vector<int> r1,r2;
    while (scanf("%d %d",&a,&b) != EOF)
    {
	r1.push_back(gcd(a,b));
	r2.push_back(a/r1[r1.size()-1]*b);
    }
    for (int i=0; i<r1.size(); i++)
    {

C++: #include <iostream>

int  main() {

	//?????§??¬?´???° =????????????????????????????????????
	/*(1) a ??? b ??§???????????????????????? r ?????\????????????
	???(2) r ??? 0 ?????? b ????????§??¬?´???°??§?????????????????????????????????
	???(3) ????????§????????¨????????°a = b?????°b = r ??¨?????? (1) ???????????????????????????*/

	 //????°???¬?????° =???a*b???/???a??¨b????????§??¬?´???°?????§?±?????????????
	long long  a = 0, b = 0, ad = 0, bd = 0, swap, amari, koba = 0;
	std::cin >> a >> b;
	ad = a; bd = b;
	if (b >= a) { swap = a; a = b; b = swap; }
		
	a:
		amari = a%b;
		if (amari == 0) {
			std::cout << b << " ";
			std::cout << ad*bd / b << std::endl;
		}
		else {
			a = b;
			b = amari;
			goto a;
		}
}

C++: #include <iostream>
using namespace std;

int gcm(int a, int b) {
  if (b==0) return a;
  return gcm(b, a%b);
}

int main() {
  int x,y;
  while(cin >> x >> y) {
    int a = gcm(x,y);
    cout << a << " " << x*y/a << endl;
  }
}

C++: #include <iostream>
#include <math.h>

using namespace std;

void solve(int a, int b) {
	int max_num = max(a,b);
	int p[max_num]; int count = 2;
	bool f;
	for (int i=2; i<max_num; i++) {
		if (i == 2) {
			p[0] = 2;
		} else if (i == 3) {
			p[1] = 3;
		} else {
			for (int j=0; j<sizeof(p); j++) {
				if (i%p[j]==0) {
					f = false;
				}
			}
			if (f) {
				p[count] = i;
				count++;
			}
		}
	}
	int gcj = 0;
	for (int i=0; i<sizeof(p); i++) {
		if (a%p[i]==0 && b%p[i]==0)
			gcj = max(gcj, p[i]);
	}
	int lcm = a*b/gcj;
	cout << gcj << " " << lcm << endl;
}

int main() {
	int a, b;
	while (cin >> a >> b) {
		solve(a,b);
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
using namespace std;
typedef long long Int;
Int gcd(Int a, Int b)
{   
  return b != 0 ? gcd(b, a % b) : a; }

Int lcm(Int a, Int b) {
  return a * b / gcd(a, b);
}

main() {
  Int a,b;
  while((cin>>a>>b)) {
    Int gc = gcd(a,b);
    cout << gc << " " << a*b/gc << endl;
  }
}

C++: #include <iostream>
using namespace std;

long long main() {
	int a,b,e,f;
	while(cin>>a>>b){
		int l;
		e=a;
		f=b;
		while(1){
		if(e>f){
			e=e%f;
		}
	    if(f>e){
	    	f=f%e;
	    }
	    if(f==e){
	    	l=e;
	    	cout<<l<<" "<<(a*b)/l<<endl;
	    	break;
	    }
		}
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <string>
#include <sstream>

using namespace std;

void inputData(vector<string>& data_set) {
	string buffer;
	while(getline(std::cin,buffer))
		data_set.push_back(buffer);
}

vector<string> splitString(const string& str, const string& separator = " ") {
	vector<string> ret;

	std::size_t bp, ep;
	bp = ep = 0;
	while((ep = str.find_first_of(separator, bp)) != string::npos){
		if(bp != ep){
			ret.push_back(string(str.begin() + bp, str.begin() + ep));
		}
		bp = ep + 1;
	}

	if(bp <= str.size() - 1){
		ret.push_back(string(str.begin() + bp, str.end()));
	}

	return ret;
}

template <class T>
T convertStringToNumber(const string& str) {
	stringstream ss;
	T ret;

	ss << str;
	ss >> ret;

	return ret;
}



vector<int> parseStringData(const string& data_str) {
	auto buff = splitString(data_str);

	vector<int> ret(buff.size());
	for(int i = 0; i < buff.size(); ++i){
		auto temp = convertStringToNumber<int>(buff[i]);
		ret[i] = temp;
	}

	return ret;
}


int calcGCD(int a, int b) {
	return (a % b == 0) ? b : calcGCD(b, a%b);
}


void displayAnswer(int a, int b) {
	int gcd = calcGCD(a, b);
	int lcm = gcd * (a/gcd) * (b/gcd);
	std::cout << gcd << " " << lcm << std::endl;
}


void doAllProcess() {
	vector<string> buffer;
	inputData(buffer);

	for(int i = 0; i < buffer.size(); ++i){
		auto data_set = parseStringData(buffer[i]);

		int a, b;
		if(data_set[0] > data_set[1]) {
			a = data_set[0];
			b = data_set[1];
		}
		else {
			a = data_set[1];
			b = data_set[0];
		}

		displayAnswer(a, b);
	}
}


int main() {
	doAllProcess();

	return 0;
}

C++: 
#include <iostream>
using namespace std;

typedef long long ll;

ll gcd(ll a, ll b){
return a != 0 ? gcd(b % a, a) : b;
}

int main() {
ll a, b;
while(cin >> a >> b)
cout << gcd(a, b) << " " << a / gcd(a, b) * b << endl;}

C++: #include <stdio.h>

int main(void) {
	int a, b, x, y, n, m, max, i;
	while(scanf("%d %d", &a, &b) != EOF){
		if(a < b){
			n = a;
			m = b;
		}
		else{
			n = b;
			m = a;
		}
		for(i = 1; i <= n; i++){
			if(a % i == 0 && b % i == 0) x = i;
		}
		max = a * b;
		y = max / x;
		printf("%d %d\n", x, y);
	}
	return 0;
}