Ramanujan-Diophantus

17R+29D=1729 \large 17R + 29D = 1729

Let (R1,D1),(R2,D2),,(Rn,Dn)(R_1, D_1), (R_2, D_2) , \ldots , (R_n, D_n) be the positive integer pair of roots to the equation above. Find the value of i=1n(Ri+Di) \displaystyle \sum_{i=1}^n (R_i + D_i) .

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