How many ordered triples $(a, b, c)$ of positive integers are there such that none of $a, b, c$ exceeds $2010$ and each of $a, b, c$ divides $a + b + c$?
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Tags: number theory unsolved, number theory
How many ordered triples $(a, b, c)$ of positive integers are there such that none of $a, b, c$ exceeds $2010$ and each of $a, b, c$ divides $a + b + c$?