Which expression represents the number of positive divisors of n=p1e1p2e2…pkekn = p_1^{e_1} p_2^{e_2} \dots p_k^{e_k}n=p1e1p2e2…pkek?
e1+e2+⋯+eke_1 + e_2 + \dots + e_ke1+e2+⋯+ek
(e1+1)(e2+1)…(ek+1)(e_1+1)(e_2+1)\dots(e_k+1)(e1+1)(e2+1)…(ek+1)
p1e1…pkekp_1 e_1 \dots p_k e_kp1e1…pkek
e1e2…eke_1 e_2 \dots e_ke1e2…ek