program prost_01;
var ch, del, kd, k: integer;
begin
k:=0;
for ch:=1024 to 16384 do
begin
kd:=0;
for del:=1 to ch do
if ch mod del=0 then inc(kd);
If kd=2 then k:=k+ch;
end;
write('k=',k);
end.
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