Nat.card_multiples

∀ (n p : ℕ), {e ∈ Finset.range n | p ∣ e + 1}.card = n / p

Exactly n / p naturals in [1, n] are multiples of p. See Nat.card_multiples' for an alternative spelling of the statement.

Defined in: Mathlib.Data.Nat.Factorization.Basic
Cited by: 0 results in Mathlib
Foundations: Depth 67 from the axioms · uses propext, Classical.choice, Quot.sound

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