Problem
2017 AIME I Problem 12
Call a set S product-free if there do not exist a, b, c \in S (not necessarily distinct) such that a b = c. For example, the empty set and the set \{16, 20\} are product-free, whereas the sets \{4, 16\} and \{2, 8, 16\} are not product-free. Find the number of product-free subsets of the set \{1, 2, 3, 4, \ldots, 7, 8, 9, 10\}.
Leading zeroes must be inputted, so if your answer is 34, then input 034
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