Commit 2025-12-02 09:01 4aacc267

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refactor(NumberTheory/ArithmeticFunction): split long file (#32304) Split the > 1500 line Mathlib.NumberTheory.ArithmeticFunction into several smaller pieces.

Estimated changes

deleted theorem ArithmeticFunction.coe_mk
deleted theorem ArithmeticFunction.ext
deleted def ArithmeticFunction
deleted theorem Nat.card_divisors
deleted theorem Nat.sum_divisors
added theorem ArithmeticFunction.ext
added theorem Nat.card_divisors
added theorem Nat.sum_divisors