wr recently learned the Euclidean algorithm to solve the greatest common divisor,then he realized that the algorithm can also be able to solve the least common multiple.In order to train the skill of code,he find a number p(1<=p<=2^25)and a number q(1<=q<=2^25) then he got n=p*q,he calculated a1=∑gcd(i, n) 1<=i <=n and a2= ∑lcm(i, n) 1<=i <=n,he wants to know if a2-a1 is the multiple of c(1<=c<=10^9)