Go: package main

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

var sc = bufio.NewScanner(os.Stdin)
var out = bufio.NewWriter(os.Stdout)

func main() {
	sc.Split(bufio.ScanLines)
	defer out.Flush()

	for sc.Scan() {
		x, y := nextInts()
		if x < y {
			rep := x
			x, y = y, rep
		}
		gcd := x % y
		lcm := x * y
		for gcd != 0 {
			x, y, gcd = y, gcd, x%y
		}
		fmt.Fprintf(out, "%d %d\n", y, lcm/y)
	}

}

func nextInts() (a, b int) {
	s := strings.Split(sc.Text(), " ")
	ra, _ := strconv.Atoi(s[0])
	rb, _ := strconv.Atoi(s[1])
	a = ra
	b = rb
	return
}

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

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

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

C++: #include <stdio.h>

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

int main()
{
	int a, b;
	while(scanf("%d%d", &a, &b)!=EOF) {
		int g = gcd(a, b);
		printf("%d %d\n", g, a/g*b);
	}
	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<vector>
#include<algorithm>
#include<cmath>
#include<queue>
#include<stack>
using namespace std;

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

int main(){
    int A,B;
	while(cin>>A>>B){
		printf("%d %d\n",gcd(A,B),A*B/gcd(A,B));
	}
    return 0;
}

C++: #include<iostream>
using namespace std;
int getmax(int a,int b){
	if(b==0) return a;
	return getmax(b,a%b);
}
int getmin(int a,int b){
	return a*b/getmax(a,b);
}
int main(){
	int a;
	int b;
	int t;
	while(scanf("%d%d",&a,&b)){
	if(a>b){
		t=a;
		a=b;
		b=t;
	}
	cout<<getmax(a,b)<<endl;
	cout<<getmin(a,b)<<endl;
	}
	return 0;
}

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

int main(){
int  a,b,ta,tb;
	
	while(cin>>a>>b){
	ta=a;tb=b;
	if(a<b)swap(a,b);
	while(1){
	
		int tmp=b;
		b=a%b;
		a=tmp;
		cout<<a<<b<<endl;
		//if(b==0)break;
	}
	if(a!=0)cout<<a<<" "<<ta*tb/a<<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;
		gcd = b;
		while (a % b != 0){
			r = a % b;
			a = b;
			gcd = a;
			b = r;
		}

		lcm /= gcd;

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

	return 0;
}

C++: #include <iostream>
using namespace std;
int GCDr(int x,int y,int n,int d) {
	if (x % n == 0 && y % n == 0) {
		return n;
	}
	else {
		return d;
	}
}
int main() {
	int t;
	for (t = 0; t < 50; t ++) {
		int a, b, i, GCD, LCM;
		cin >> a >> b;
		if (a > b) {
			swap(a, b);
		}
		for (i = 1; i <= a && i <= b / 2; i++) {
			GCD = GCDr(a, b, i, GCD);
		}
		GCDr(a, b, i, GCD);
		LCM = a * b / GCD;
		cout << GCD << " " << LCM << endl;
	}
}

C++: #include <stdio.h>

long long int a ;
long long int b ;

long long int gcd ( ) ;

int main ( )
{
	while ( scanf ( "%lld %lld" , &a , &b ) == 2 ) {
		long long int oa = a ;
		long long int ob = b ;
		long long int tmp = gcd ( ) ;
		printf ( "%lld %lld\n" , tmp , oa / tmp * ob ) ;
	}
	return 0 ;
}

long long int gcd ( )
{
	while ( ( a %= b ) && ( b %= a ) ) ;
	return ( a + b ) ;
}

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


 
int main(){
	int in[2],a,b,ans[2],i = 1,n,stop = 1;
	while(cin >> in[0] >> in[1]){
		a = in[0];
		b = in[1];
		if(a >= b){
			while(a >= 0){
				if(in[0] % a == 0 and in[1] % a == 0){
					ans[0] = a;
					break;
				}
				a--;
			}
		}else if(b >= a){
			while(b >= 0){
				if(in[0] % b == 0 and in[1] % b == 0){
					ans[0] = b;
					break;
				}
				b--;
			}
		}else{
			ans[0] = 1;
		}
		cout << ans[0] << endl;
		a = in[0];
		b = in[1];
		ans[1] = 1;
		n = 1;
		i = 1;
		while(i <= a or i <= b and stop == 1){
		n = 1;
		cout << " << i = " << i << endl;			
			while(i >= n){
				cout << "n = " << n << endl;
				if(a * i == b * n){
					ans[1] = a * i;
					stop = 0;
					break;
				}
				n++;
			}
		
		i++;
		}
		stop = 1;
		cout << ans[1] << endl;
		
	}
}

C++: #include <stdio.h>

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

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

int main(void){
	int a,b,x,y;
	while(scanf("%d %d",&a,&b)!=EOF){
		x=gcd(a,b);
		y=lcm(a,b);
		printf("%d %d\n",x,y);
	}
}

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

long gcd(long a, long b){
	if (a % b == 0){
		return b;
	}
	else {
		return (gcd(b, a%b));
	}
}
long lcm(long a, long b){
	long gc = gcd(a,b);
	long x = a*b;
	x = x / gc;
	return x;

}

int main(){
	long a,b;
	while (cin >> a >> b){
		long gc = 0;
		if (a >= b){
			gc = gcd(a, b);
		}
		else{
			gc = gcd(b,a);
		}
		long lc = 0;
		if (a >= b){
			lc = lcm(a, b);
		}
		else{
			lc = lcm(b,a);
		}
		cout << gc << " " << lc << endl;

		

	}



	return 0;
}

C++: #include <stdio.h>

typedef long long ll;

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

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

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

C++: #include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <cstring>
#include <climits>
#include <cmath>
#include <cfloat>

#define FOR(i,b,n) for(int i=b;i<n;i++)
#define CLR(mat) memset(mat, 0, sizeof(mat))
#define INF 1<<25

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 a, b;

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

	return 0;
}

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

int main(){
		int a, b;
		while(cin >> a >> b){
				int gcd;
				vector<int> divisor_a;
				vector<int> divisor_b;
				for(int i = 2; i <= a; i++){
						if(a % i == 0) divisor_a.push_back(i);
				}
				for(int i = 2; i <= b; i++){
						if(b % i == 0) divisor_b.push_back(i);
				}
				for(int i = 0; i < divisor_a.size(); i++){
						for(int j = 0; j < divisor_b.size(); j++){
								if(divisor_a[i] == divisor_b[j]) gcd = divisor_a[i];
						}
				}
				int lcm = a / gcd * b;
				cout << gcd << " " << lcm << endl;
		}
		return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

#define Vi vector<int>
#define FOR(i,s,e) for (int i=s; i<e; i++)
#define ITER(v) v.begin(), v.end()

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int64_t a, b;
    int64_t gcd;
    int64_t minval;
    bool iscoprime;

    while (true) {
        cin >> a >> b;
        if (cin.eof()) { break; }
        gcd = 1;
        while (true) {
            iscoprime = true;
            minval = min(a,b);
            FOR(i,2,minval+1) {
                if (a % i == 0 && b % i == 0) {
                    a /= i;
                    b /= i;
                    gcd *= i;
                    iscoprime = false;
                    break;
                }
            }
            if (iscoprime) { break; }
        }
        cout << gcd << " " << gcd * a * b << endl;
    }

    return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<cstdio>
using namespace std;
int main(){
	long long a,b,s,m,ta,tb,tmp;
	while(cin>>a>>b){
	ta=a,tb=b;
	s=0,m=0;
	if(a<b)swap(a,b);
	else 
	while(true){
		if(a==0||b==0)cout<<"a#";
		tmp=a;
		a=b;
		b=tmp%a;
		if(a%b==0){
			m=b;
			break;
		}
		if(a<b){
		//cout<<a<<" "<<b<<endl;
		m=1;
		break;
		}
		s=(ta*tb)/m;
		cout<<m<<" "<<s<<endl;
	}
	}
}