Mr IYER and GCD

Mr Iyer and his friend Sudhanshu have learnt today a new concept in Maths called GCD(Greatest Common Divisor) i.e, GCD for n numbers can be defined as the largest number dividing all of the n numbers. They are solving a GCD related problem in which they are given an array of N numbers and a parameter K. they need to find the maximum size of contiguous subarray (i.e numbers in sequence) having GCD