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++: /*
　　　　 ∧＿∧　にっぽんちゃちゃちゃ
　／＼（　・∀・）／ヽ
（ ●　と　　　つ　● ）　にっぽんちゃちゃちゃ
　＼/⊂、 ノ　　＼ノ
　　　　　し'
*/
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define repone(i,n) for(int i=1;i<(int)(n);++i)
#define repo(i,o,n) for(int i=o;i<(int)(n);++i)
#define Rep(j,n) for(int j=0;j<(int)(n);++j)
#define Repone(j,n) for(int j=1;j<(int)(n);++j)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define int long long
#define MOD 1000000007
#define INF 9223372036854775807

signed main()
{
  string xyz ="";
int x=0,y=0,z=0,w=0,i=0,j=0,n=0;
while(std::cin >> x>>y){
  z=x*y;
  w=x%y;
  while(w!=0){
    x=y;
    y=w;
    w=x%y;
  }
  std::cout <<y <<" "<<z/y<< '\n';
}

}

C++: #include <stdio.h>

int gcd(int a, int b){
	int t;
	while((a % b) != 0){
		t = b;
		b = a % b;
		a = t;
	}
	return b;
}

int main(){
	int a,b;
	int t;
	while(scanf("%d%d", &a, &b) != EOF){
		t = gcd(a,b);
		printf("%d %d\n", t, a/t*b);
	}
}

C++: #include <iostream>
using namespace std;
int LCM(int a, int b);
int GCD(int a, int b, int ans1);

int main(){
    int a,b;
    while(cin >> a >> b){
        int ans1 = LCM(a,b);
        int ans2 = GCD(a,b,ans1);
        cout << ans1 << " " << ans2 << endl;
    }
}

int LCM(int a, int b){
    int r;
    if(a < b){
        int tmp = a;
        a = b;
        b = tmp;
    }
    while(1){
        r = a % b;
        if(r == 0) break;
        a = b;
        b = r;
    }
    
    return b;
}

int GCD(int a, int b, int ans1){
    int ans = b / ans1 * a;
    return ans;
}

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

template<class T>
T gcd(T a,T b){
	return b ? gcd(b,a % b) : a;
}

template<class T>
T lcm(T a,T b){
	return a / gcd(a,b) * b;
}

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

C++: #include<iostream>

int main(){
	long int a, b, r;
	
	while(std::cin >> a >> b){
		long int product = a*b;
		
		// GCD
		if(a < b){
			long int temp = a;
			a = b;
			b = temp;
		}
		while((r = a%b) != 0){
			a = b;
			b = r;
		}
		
		// LCM
		long int lcm = product / b;
		
		// show
		std::cout << b << lcm << std::endl;
	}
	
	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>


unsigned int gcd(unsigned int a, unsigned int b) {
	unsigned int r;

	while (b != 0) {
		r = a % b;
		a = b;
		b = r;
	}

	return a;
}

unsigned int lcm(unsigned int a, unsigned int b) {
	unsigned int mult;

	if (a > b) {
		unsigned int tmp = a;
		a = b;
		b = tmp;
	}

	for (unsigned int k = 1; k <= a; k++) {
		mult = b * k;
		if (mult % a == 0) { return mult; }
	}

	return 0;
}

int main() {
	unsigned int a, b;
	
	while (!std::cin.eof()) {
		std::cin >> a >> b;
		std::cout << gcd(a, b) << " " << lcm(a, b) << std::endl;
	}
}

C++: #include<stdio.h>
int main(void) {
	long long int a, b, minans = 0, maxans = 0;
	while (scanf("%lld %lld", &a, &b) != EOF)
	{
		for (long long int i = (b / 2); i >= 1; i--)
		{
			if (a%i == 0 && b%i == 0) {
				maxans = i;
				break;
			}
		}
		for (long long int i = 1; i <= a; i++)
		{
			if ((i*b) % a == 0) {
				minans = i*b;
				break;
			}
		}
		printf("%lld %lld\n", maxans, minans);
	}
	return 0;
}

C++: #include<cstdio>
#include<iostream>
using namespace std;
long long gcd(long long a,long long b){
    if(b==0)return a;
    else return gcd(b,a%b);
}
int main(){
    long long a,b;
    while(cin>>a>>b){
        long long x;
        if(a>b)x=gcd(a,b);
        else x=gcd(b,a);
        cout<<x<<" "<<a/x*b<<endl;

    }
}

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

int main()
{
	long a,b;
	while(cin>>a>>b)
	{
		long numerator=min(a,b);
		long denominator=max(a,b);
		long remainder = a % b;
		while(remainder !=0)
		{
			 numerator   = denominator;
			denominator = remainder;
			remainder   = numerator % denominator;
		}
		long gcd = denominator;
		long long lcm = a * (b / gcd);
		cout<<gcd<<" "<<lcm<<endl;
		/*
		for(long i=min(a,b);i>0;i--)
		{
			if(a%i ==0)
				if(b%i==0)
				{
					cout<<i<<" ";
					break;
				}
		}
		for(long i=max(a,b);i<=2000000000;i+=max(a,b))
		{
			if(i%a ==0)
				if(i%b==0)
				{
					cout<<i<<endl;
					break;
				}
		}*/
	}
}

C++: #include <stdio.h>
#include <stdlib.h>
#include <cmath>
#include <string.h>
#include <iostream>
#include<algorithm>
#include <queue>
#include <vector>
#include <math.h>
#include<string>
//******************************************************
#define lrt (rt*2)
#define rrt  (rt*2+1)
#define LL long long
#define inf 0x3f3f3f3f
#define pi acos(-1.0)
#define exp 1e-8
const double temp=(1+sqrt(5))/2;
//***************************************************
#define eps             1e-8
#define inf             0x3f3f3f3f
#define INF             2e18
#define LL              long long
#define ULL             unsigned long long
#define PI              acos(-1.0)
#define pb              push_back
#define mk              make_pair

#define all(a)          a.begin(),a.end()
#define rall(a)         a.rbegin(),a.rend()
#define SQR(a)          ((a)*(a))
#define Unique(a)       sort(all(a)),a.erase(unique(all(a)),a.end())
#define min3(a,b,c)     min(a,min(b,c))
#define max3(a,b,c)     max(a,max(b,c))
#define min4(a,b,c,d)   min(min(a,b),min(c,d))
#define max4(a,b,c,d)   max(max(a,b),max(c,d))
#define max5(a,b,c,d,e) max(max3(a,b,c),max(d,e))
#define min5(a,b,c,d,e) min(min3(a,b,c),min(d,e))
#define Iterator(a)     __typeof__(a.begin())
#define rIterator(a)    __typeof__(a.rbegin())
#define FastRead        ios_base::sync_with_stdio(0);cin.tie(0)
#define CasePrint       pc('C'); pc('a'); pc('s'); pc('e'); pc(' '); write(qq++,false); pc(':'); pc(' ')
#define vi              vector <int>
#define vL              vector <LL>
#define For(I,A,B)      for(int I = (A); I < (B); ++I)
#define rFor(I,A,B)     for(int I = (A); I >= (B); --I)
#define Rep(I,N)        For(I,0,N)
using namespace std;
const int maxn=550;
LL  gcd(LL a,LL b)
{
    return b==0?a:gcd(b,a%b);
}
LL lcm(LL a,LL b)
{
    return a*b/gcd(a,b);
}
int main()
{
    LL x,y;
    while(scanf("%I64d %I64d",&x,&y))
    {
        printf("%I64d %I64d\n",gcd(x,y),lcm(x,y));
    }
}

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

C++: #include<bits/stdc++.h>
using namespace std;
#define all(vec) vec.begin(),vec.end()
typedef long long int ll;
typedef pair<ll,ll> P;
const ll MOD=1234567;
const ll INF=1000000010;
const ll LINF=1000000000000000010LL;
const int MAX=500010;
const double EPS=1e-3;
int dx[4]={0,1,0,1};
int dy[4]={0,0,1,1};
//最大公約数
ll gcd(ll m,ll n){
    if((0==m)||(0==n)){
        return 0;
    }
    if(m<n){
        swap(m,n);
    }
    ll r=m%n;
    while(r!=0){
        m=n;
        n=r;
        r=m%n;
    }
    return n;
}
//最小公倍数
ll lcm(ll m,ll n){
    if((0==m)||(0==n)){
        return 0;
    }
    return ((m/gcd(m,n))*n);
}
int main(){
	ll a,b;
	while(cin>>a>>b){
		cout<<gcd(a,b)<<" "<<lcm(a,b)<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <cmath>
#include <map>

using namespace std;

int gcd(int a,int b)
{
while(b != 0){
int c = a%b;
gcd(b,c);
}
return a;
}

int main()
{
int a,b;
while(~scanf("%d %d",&a,&b)){
printf("%d %d",gcd(a,b),(a*b)/gcd(a,b));
}
}

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

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

	int main(){

		long long  a,b,g,l;
		while(cin>>a>>b)
		{
			g = gcd(a,b);
			l = a * b /g;
			cout<<g<<" "<<l<<endl;	
		}		
		return 0;
	}