Why does is still show wrong answer for test case 1

#1

i have coded the solution using set theory using the relation
(AUB)=nA+nB-(A intersection B)
first i found all numbers till n which are divided by 2,3,5,7,11,13,17,19 taken one at a time then subtracted total no. of numbersdivisible taken two primes at a time then add no.of numbers taken 3 at a time and so on. yet the answer for first test case is wrong.
please help me to find which test case is wrong.

#2

instead of 17 you should write 7.

#3

answer=divide(n,1,a)-divide(n,2,a)+divide(n,3,a)-divide(n,4,a)+divide(n,5,a)-divide(n,6,a)+divide(n,17,a)-divide(n,8,a);

#4

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