num1=io.read("*n") num2=io.read("*n") --约数和函数 function Friendly (a) sum=0 for i=1,a-1,1 do if a%i==0 then sum=sum+i end end return sum end sum1=Friendly(num1) sum2=Friendly(num2) if sum1==num2 and sum2==num1 then print("yes") else print("no") end