#include<stdio.h>
#include<iostream>
#include<algorithm>
#define inf 0X7fffffff
#define int long long 
using namespace std;
const int N=2e5+9;
int read(int &x){
    int dat=0,oko=1;char chc=getchar();
    while(chc<'0'||chc>'9'){if(chc=='-')oko=-1;chc=getchar();}
    while(chc>='0'&&chc<='9'){dat=dat*10+chc-'0';chc=getchar();}
    x=dat*oko;return x;
}int T,n,k,_gcd,a[N],ans1,ans2;
int gcd(int x,int y){
    while(y){
        x%=y;swap(x,y);
    }return x;
}
void solve(){
    cin>>n>>k;ans1=0,ans2=0;
    for(int i=1;i<=n;i++)cin>>a[i];
    if(n==1){
        cout<<n<<" "<<(((k+1)*k)>>1)<<"\n";
        return;
    }sort(a+1,a+1+n);_gcd=0;
    for(int i=2;i<=n;i++){
        _gcd=gcd(_gcd,a[i]-a[i-1]);
    }for(int i=1;i*i<=_gcd&&i<=a[1]+k;i++){
        if(!(_gcd%i)){
            if(i>a[1]){ans1++;ans2+=i-a[1];}
            if(i*i!=_gcd&&_gcd/i<=a[1]+k&&_gcd/i>a[1]){
                //cout<<"fk"<<_gcd/i<<"\n";
                ans1++;ans2+=(_gcd/i)-a[1];
            }
        }
    }cout<<ans1<<" "<<ans2<<"\n";
}
signed main(){
    cin>>T;
    while(T--)solve();
    return 0;
}
/*
3
5 10
7 79 1 7 1
2 1000000000
1 2
1 100
1000000000
*/