A $\alpha _{1} \times \alpha _{2} \times\cdots\alpha _{k}$

B $(\alpha _{1}+ 1)\times (\alpha _{2}+ 1)\times \dots \times (\alpha _{k} + 1)$

C $\left ( 1+ p _{1} + p _{1}^{2}+ \dots p_{1}^{\alpha _{1} } \right ) \times \left ( 1+ p _{2} + p _{2}^{2}+ \dots p_{2}^{\alpha _{2} } \right )\times \dots \times \left ( 1+ p _{k} + p _{k}^{2}+ \dots p_{k}^{\alpha _{k} } \right )$

D $\alpha _{1} + \alpha _{2} + \dots + \alpha _{k} $