Here's a breakdown of the number of episodes per season:

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65 episodes + Predacons Rising

Transformers Prime (2010–2013) has a total of across three seasons, plus a feature-length TV movie that serves as the series finale.

65 episodes

Transformers Prime has more episodes than Beast Wars (52 episodes) but fewer than the original G1 series (98 episodes).

In total, Transformers: Prime has $$16 + 16 + 15 = 47$$ episodes.