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#include <cstdio>
#define ValMax 1000005
using namespace std;
bool fr[ValMax];
int cnt[ValMax],a[100005],len[100005],LEN;
int v[100005][9];
inline void Desc(int lin, int x)
{
int d=3,k=0;
len[lin]=0;
while(x%2==0)
{
++k;
x/=2;
}
if(k) v[lin][++len[lin]]=2;
while(x>1 && d*d<=x)
{
k=0;
while(x%d==0)
{
++k;
x/=d;
}
if(k) v[lin][++len[lin]]=d;
d+=2;
}
if(x>1) v[lin][++len[lin]]=x;
}
inline void Back(int pas, int produs)
{
if(pas==len[LEN]+1)
{
++cnt[produs];
return;
}
Back(pas+1,produs);
Back(pas+1,produs*v[LEN][pas]);
}
int main()
{
int n,i,j,x,nr,produs,stare;
long long sol=0;
freopen ("pairs.in","r",stdin);
freopen ("pairs.out","w",stdout);
scanf("%d", &n);
for(i=1;i<=n;++i)
{
scanf("%d", &a[i]);
Desc(i,a[i]);
LEN=i;
Back(1,1);
}
cnt[1]=n;
for(i=1;i<=n;++i)
{
for(stare=1;stare<(1<<len[i]);++stare)
{
produs=1;
for(j=nr=0;j<len[i];++j)
if((1<<j)&stare)
{
++nr;
produs=produs*v[i][j+1];
}
if(nr&1) sol+=cnt[produs]-1;
else sol-=cnt[produs]-1;
}
}
printf("%lld\n", 1LL*n*(n-1)/2-sol/2);
return 0;
}