Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func gcd(num1, num2 int) int {
	if num2 == 0 {
		return num1
	}
	num3 := num1 % num2
	return gcd(num2, num3)
}

func lcm(num1, num2 int) int {
	if num1%num2 != 0 {
		num3 := gcd(num1, num2)
		for i := 1; ; i++ {
			check := num3 * i
			if check%num1 == 0 && check%num2 == 0 {
				return check
			}
		}
	} else {
		return num1
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		row := strings.Fields(scanner.Text())
		nums := []int{}

		for _, v := range row {
			num, _ := strconv.Atoi(v)
			nums = append(nums, num)
		}
		fmt.Println(gcd(nums[0], nums[1]), lcm(nums[0], nums[1]))
	}
}

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

int main(){
	long long int n[50]={0};
	int i=0;
	while(cin>>n[i++]);
	int nn=i-1;
	for(int j=0;j<nn;j+=2){
		long long int gcd=0,lcm=0;
		for(long long int k=1;k<n[j]+n[j+1];k++){
			if(n[j]%k+n[j+1]%k==0)gcd=k;
		}
		long long int a=0,b=0;
		a=n[j]/gcd,b=n[j+1]/gcd;
		cout<<gcd<<" "<<gcd*a*b<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <vector>
#include <set>
#include <map>
#include <list>
#include <iterator>
#include <queue>
#include <stack>
#include <deque>
#include <sstream>
#include <algorithm>
#include <numeric>
#include <string>
#include <cmath>
#include <complex>
#include <functional>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <cstdlib>
#include <cctype>

#define REP(i,m,n) for(int i=m;i<n;i++)
#define rep(i,n) for(int i=0;i<n;i++)
#define rp(i,c) rep(i,(int)c.size())
#define fr(i,c) for(__typeof((c).begin()) i=(c).begin();i!=(c).end();i++)
#define mp make_pair
#define pb push_back
#define all(c) (c).begin(),(c).end()
#define rall(u) (u).rbegin(),(u).rend()
#define dbg(x) cerr<<#x<<" = "<<(x)<<endl
#define v_delete(a,b) (a).erase(remove((a).begin(), (a).end(), b), (a).end())
#define v_unique(a) (a).erase(unique((a).begin(), (a).end()), (a).end())
#define VV(T) vector<vector< T > >
#define init(a,b) memset((a), (b), sizeof((a)))
using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pi;
const int inf=1<<28;
const double INF=1e10,EPS=1e-9;


template<class T>int SIZE(T a){return a.size();}
template<class T>string IntToString(T num){string res;stringstream ss;ss<<num;return ss.str();}
template<class T>T StringToInt(string str){T res=0;for(int i=0;i<SIZE(str);i++)res=(res*10+str[i]-'0');return res;}
template<class T>T gcd(T a,T b){if(b==0)return a;return gcd(b,a%b);}
template<class T>T lcm(T a,T b){return a/gcd(a,b)*b;}

template <class T> void input(T& a, int n) { for (int i = 0; i < n; ++i) cin >> a[i]; }
template <class T> void input(T* a, int n) { for (int i = 0; i < n; ++i) cin >> a[i]; }
typedef pair<int,int> pii;

inline bool IN(int x, int y, int w, int h)
{
    return 0 <= x && x < w && 0 <= y && y < h;
}


int main()
{
	int a,b;
	while(cin >> a >> b){
		cout << gcd(a,b) << " " << lcm(a,b) << endl;
	}
	return 0;
}

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

int main() {
	// your code goes here
	long long int a,b;
	long long int miner,maxer;
	while(cin >> a >> b){
		int a2=a,b2=b;
		while(max(a2,b2)%min(a2,b2)!=0){
			if(a2>b2)
			a2=a2-b2;
			else
			b2=b2-a2;
		}
		miner =min(a2,b2);
		cout << miner << endl;
		cout << a/miner*b << endl;
	}
	return 0;
}

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

using namespace std;

int calc_gcj(int a, int b) {
	int A=0, B=0;
	if (a == max(a,b)) {
		A = a;
		B = b;
	} else {
		A = b;
		B = a;
	}
	if (A == B) return A;
	else return calc_gcj(B,A%B);
	return -1;
}

void solve(int a, int b) {
	int gcj = calc_gcj(a,b);
	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>
using namespace std;

int gcd(int m, int n);
int lcm(int m,int n);

int main()
{
	int a[50], b[50];
	int set = 0;
	while( cin >> a[set] >> b[set])
		set++;

	for(int i = 0; i < set; i++)
		cout << gcd(a[i], b[i]) << " " << lcm(a[i], b[i]) << endl;

	return 0;
}

int gcd(int m, int n)
{
	int t;
	if(m < n){
		t = m;
		m = n;
		n = t;
	}
	t = m % n;
	while(t != 0){
		m = n;
		n = t;
		t = m % n;
	}
	return n;
}

int lcm(int m, int n)
{
	if(0 == m || 0 == n)
		return 0;
	return ((m / gcd(m, n)) * n);
}

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

int gcd(int a, int b){
	return (b>0)? gcd(b, a%b) : a;
}
int lcm(int a, int b){
	return a / gcd(a, b) * b;
}

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

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

int main(){
	std::ios::sync_with_stdio(false);
    std::cin.tie(0);
	
	long long int n[50]={0};
	int i=0;
	while(cin>>n[i++]);
	int nn=i-1;
	for(int j=0;j<nn;j+=2){
		long long int gcd=0,lcm=0;
		for(long long int k=1;k<n[j];k++){
			if(n[j]%k+n[j+1]%k==0)gcd=k;
		}
		long long int a=0,b=0;
		a=n[j]/gcd,b=n[j+1]/gcd;
		cout<<gcd<<" "<<gcd*a*b<<endl;
	}
	return 0;
}

C++: #include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<string>
#include<algorithm>
#include<vector> 
#include<limits>
#include<numeric>
#include<math.h>
using namespace std;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define in(x) cin >> x
#define out(str) cout << str << endl

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int gcd(int a, int b) {
  return b != 0 ? gcd(b, a % b) : a;
}
int lcm(int a, int b) {
  return a / gcd(a, b) * b;
}
int a,b;

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

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

int GCD( int x , int y )
{
	if( x < y ){ swap( x,y ); }

	if( x % y == 0 ){ return y ; }
	else{ GCD( y , x%=y ) ; }
}

int main()
{
	unsigned int a,b ;

	while( cin >> a >> b )
	{
		cout << GCD(a,b) << " " << a/GCD(a,b) * b ;
	}

	return 0 ;
}

C++: #include <cstdio>
#include <cstring>
#include <vector>
#include <set>
#include <map>
#include <string>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <iostream>
#include <queue>
#include <stack>
#include <sstream>
#include <cctype>
using namespace std;

#define PQ priority_queue
#define P pair<int,int>
#define CLA(array) memset(array,0,sizeof array)
#define CLINF(array) memset(array,0x3f,sizeof array)
#define CLF(array) memset(array,-1,sizeof array)
#define DB(a) cout << "DEBUG " << a << endl;
#define de(x) cout << #x << "=" << x << endl
#define rep(i,a,b) for(int i=a;i<(b);++i)
#define per(i,a,b) for(int i=(b)-1;i>=(a);--i)
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define fi first
#define se second
typedef long long LL;
typedef unsigned long long ULL;
const int MAXN = 100000 + 50;
const int INF = 1 << 30;
LL gcd(LL a,LL b){
    return b==0?a:gcd(b,a%b);
}
LL lcm(LL a,LL b){
    return a/gcd(a,b)*b;
}
int main(){
    LL a,b;
    while(cin>>a>>b){
        cout<<gcd(a,b)<<" "<<lcm(a,b)<<endl;
    }
    return 0;
}

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


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

int main()
{
	while(true){
		int a, b;
		cin>>a>>b;
		
		if(cin.eof())
			break;
			
		int g=gcd(a,b);
		cout<<g<<' '<<a/g*b<<endl;
	}
	return 0;
}

C++: #include "bits/stdc++.h"
using namespace std;

long long int gcd(long long int a, long long int b) {
    return (a == b) ? a : gcd(b % a, a);
}

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

int main() {
    long long int a, b;
    while (cin >> a >> b) {
        cout << gcd(a, b) << " " << lcm(a, b) << endl;
    }    
    return 0;
}