How many of the positive factors of 14 are not factors of…

How many of the positive factors of 14 are not factors of 21?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #31514

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