This year's divisors

$\Large 2016=\color{#D61F06}{2^5\times 3^2\times 7}$ No. of divisors= $(5+1)(2+1)(1+1)=36$
Sum of them= $(2^0+2^1+2^2+2^3+2^4+2^5)(3^0+3^1+3^2)(7^0+7^1)=6552$

Hence mean = $\dfrac{6552}{36}=\large\boxed{\color{#20A900}{182}}$