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Linear-values conjecture for σ⁺: σ⁺(n) = 2p − q for infinitely many pairs

Prove that for each prime q ≥ 3 there exist infinitely many pairs (p,n), with p prime, such that σ⁺(n)=2p−q, where σ⁺(n)=∏_{p'\mid n}(σ(p'^{v_{p'}(n)})+1).

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Background

After demonstrating structural properties of the sequence {σ⁺(n)}—including infinitely many equal-value pairs and infinitely many 3-term arithmetic progressions—the authors conjecture a strong linear-value representation property: for each fixed prime q≥3, σ⁺(n) hits the values 2p−q for infinitely many primes p, and infinitely many n.

References

Conjecture 1: For each prime $q \geq 3$, there exist infinitely many pairs $(p, n)$ such that $\sigma+(n) = 2p - q$, where $p$ is a prime number.

Divisibility and Sequence Properties of $σ^+$ and $\varphi^+$ (2508.11660 - Mandal, 6 Aug 2025) in Section 2, Main Results (Conjecture 1)