theorem proved term proof

`sigma_zero_onehundredtwenty`

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formal statement (Lean)

1203theorem sigma_zero_onehundredtwenty : sigma 0 120 = 16 := by native_decide

Term-mode proof.

1204
1205/-- σ_1(840) = 2880. -/

Lean names referenced from this declaration's body.

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