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Set a specific polynomial as a divisor of hyper elliptic curve

If I have a hyperelliptic curve of genus 2 = y2+( x2+x)y = x5+ x3 +1

and reduced divisor for the curve in Mumford is (x2+18x, 17x+1).

the two was given, I can construct the curve: as k. = GF(next_prime(2^160)); R.<x> = k[]

C = HyperellipticCurve(x^5 + x^3 + 1, x^2+x)

How to set (x2+18x, 17x+1) as it's divisor