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Cod sursa(job #252159)
program alex;
var f,g:text;
c:array[1..200005]of integer;
p:array[1..100000]of longint;
k,i,j,x,n,z,y:longint;
s:int64;
begin
k:=1;
p[1]:=2;
i:=3;
repeat
if c[i]=0 then begin
k:=k+1;
p[k]:=i;
y:=i*i;
while y<=10000 do
begin
c[y]:=1;
y:=y+i;
end;
end;
i:=i+2;
until(i>=10000);
assign(f,'sum.in');reset(f);
assign(g,'sum.out');rewrite(g);
readln(f,n);
for i:=1 to n do
begin
readln(f,x);
j:=1;
s:=x;
z:=x;
while(p[j]*p[j]<=x)and(x<>1)do
begin
if x mod p[j]=0 then begin
s:=(s div p[j])*(p[j]-1);
while x mod p[j]=0 do
x:=x div p[j];
end;
j:=j+1;
end;
if x>1 then s:=(s div x)*(x-1);
s:=s*z*2;
writeln(g,s);
end;
close(f);
close(g);
end.