theorem proved term proof

`sigma_three_six`

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formal statement (Lean)

1844theorem sigma_three_six : sigma 3 6 = 252 := by native_decide

Term-mode proof.

1845
1846/-- σ_3(8) = 1 + 8 + 64 + 512 = 585. -/

Lean names referenced from this declaration's body.

sigma in IndisputableMonolith.Decision.AbileneParadox decl_use
sigma in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions decl_use