Let $K$ be a finite extension of $\mathbb{Q}_p$, $N=p^n$ and E/K and elliptic curve whose N-torsion points have coordinates in K. For an N-torsion point $e\in E$ I am interested in expressing the function $f_e$, $div(f_e)=N(e)-N(0)$, with values restricted to the formal group of E, as a product of sigma (Theta) functions.