Problem 388

Distinct Lines

Consider all lattice points (a,b,c) with 0 a,b,c N.

From the origin O(0,0,0) all lines are drawn to the other lattice points.

Let D(N) be the number of *distinct* such lines.

You are given that D(1 000 000) = 831909254469114121.

Find D(10^{10}). Give as your answer the first nine digits followed by the last nine digits.

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These problems are part of
Project Euler
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