Go: package main

import "fmt"

func main() {
	var a, b int
	var gcd, lcm int

	for {
		_, err := fmt.Scanf("%d %d", &a, &b)
		if err != nil {
			return
		}

		var big, small int
		// GCD
		if a > b {
			big = a
			small = b
		} else {
			big = b
			small = a
		}

		for {
			if big%small == 0 {
				gcd = small
				break
			} else {
				small, big = big%small, small
			}
		}

		// LCM
		lcm = a * b / gcd

		fmt.Println(gcd, lcm)
	}
}

C++: #include <iostream>                                                                                                       
                                                                                                                          
using namespace std;                                                                                                      
                                                                                                                          
int main() {                                                                                                              
  long long int a, b, m, n, t, lcm, gcd;                                                                                  
                                                                                                                          
  while (cin >> a && cin >> b) {                                                                                          
    if (b > a) {                                                                                                          
      t = a;                                                                                                              
      a = b;                                                                                                              
      b = t;                                                                                                              
    }                                                                                                                     
                                                                                                                          
    m = a;                                                                                                                
    n = b;                                                                                                                
    while (m % n != 0) {                                                                                                  
      t = n;                                                                                                              
      n = m % n;                                                                                                          
      m = t;                                                                                                              
    }                                                                                                                     
    lcm = n;                                                                                                              
    gcd = a * b / lcm;                                                                                                    
    cout << lcm << " " << gcd << endl;                                                                                    
  }                                                                                                                       
                                                                                                                          
  return 0;                                                                                                               
}

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

long gcd(long  a,long b){
    if(b>a){long t=a;a=b;b=t;}
    while(true){
        if(a%b==0){return b;}
        else{a=a%b;}
        if(b%a==0){return a;}
        else{b=b%a;}
        }
}

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

int main (int argc, const char * argv[])
{
    int x,y;
    while(cin>>x>>y){
    cout<<gcd(x,y)<<' '<<lcm(x,y)<<endl;
    }
    return 0;
}

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

int main()
{
    long long a, b, ba, bb;
    long long gcd, lcd = 0;
    while(cin >> a >> b)
    {
        ba = a;
        bb = b;
        while(b!=0)
        {
            gcd = b;
            b = a % b;
            a = gcd;
        }
        lcd = ba * bb / gcd;
        cout << gcd << " "<< lcd << endl;
    }
    
    return EXIT_SUCCESS;
}

C++: #include <iostream>

int main()
{
    long large, small;
    long a, b, tmp;
    while (std::cin >> a >> b) {
        if (a < b) {
            tmp = a;
            a = b;
            b = tmp;
        }
        large = a;
        small = b;
        while (small != 0) {
            tmp = small;
            small = large - (large / small) * small;
            large = tmp;
        }
        std::cout << large << " " << a * b / large << std::endl;
    }
    return 0;
}

C++: #include<stdio.h> 
long long GCD(long long int A,long long B) {
	if(B%A==0) 
		return A;
	else 
	{ 
		long long Temp=A; 
		A=B%A; 
		B=Temp; 
		return GCD(A,B); 
	} 
} 
int main() { 
	long long a,b; 
	long long n1,n2; 
	while(scanf("%lld%lld",&a,&b)!=EOF) { 
		if(a<b) 
			n1=GCD(a,b); 
		else 
			n1=GCD(b,a); 
		
		n2=a*b/n1; 
		
		printf("%lld %lld\n",n1,n2); 
	} 
}

C++: #include <algorithm>
#include <cmath>
#include <climits>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <cassert>
#include <functional>

using namespace std;

#define LOG(...) printf(__VA_ARGS__)
//#define LOG(...)
#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define REP(i,n) for(int i=0;i<(int)(n);++i)
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define RSORT(c) sort((c).rbegin(),(c).rend())
#define CLR(a) memset((a), 0 ,sizeof(a))

typedef long long ll;
typedef unsigned long long ull;
typedef vector<bool> vb;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vb> vvb;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int dx[] = { -1, 0, 1, 0 }; const int dy[] = { 0, 1, 0, -1 };
bool sosuub[50000];
vector<int> sosuu;
int max(int a, int b){
	int ans=1;
	int ac=a;
	int bc=b;
	vector<int> va;
	vector<int> vb;
	for (int i = 0; ac >= sosuu[i];){
		if (ac%sosuu[i] == 0){
			ac /= sosuu[i];
			va.push_back(sosuu[i]);
		}
		else i++;
	}
	for (int i = 0; bc >= sosuu[i];){
		if (bc%sosuu[i] == 0){
			bc /= sosuu[i];
			vb.push_back(sosuu[i]);
		}
		else i++;
	}
	while (!va.empty() && !vb.empty()){
		if (va.back() == vb.back()){
			ans *= va.back();
			va.pop_back();
			vb.pop_back();
		}else{
			if (va.back() > vb.back())va.pop_back();
			else if (va.back() < vb.back())vb.pop_back();
		}
	}
	return ans;
}
int min(int a, int b){
	int ans=-1;

	return ans;
}

int main() {
	int a, b;
	for (int i = 2; i < 50000; i++){
		if (!sosuub[i]){
			sosuu.push_back(i);
			for (int j = i * 2; j < 50000; j += i){
				sosuub[j] = true;
			}
		}
	}
	while (cin >> a >> b){
		int ma = max(a, b);
		int mi = a / ma*b;
		cout << ma<< " " << mi << endl;
	}
}

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

using lint = long long;

lint gcd(lint x, lint y){
    lint r = x % y;
    while(r != 0LL){
        x = y;
        y = r;
        r = x % y;
    }
    return y;
}

lint lcm(lint x, lint y){
    return x / gcd(x, y) * y;
}

int main(){
    lint a, b;
    while(cin >> a >> b){
        cout << gcd(a, b) << " " << lcm(a, b) << endl;
    }
}