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MathNet 2023-part-03 — 191 problems (EN–VI) Question 43

Math Olympiad Vault · MathNet 2023-part-03 — 191 problems (EN–VI)

Question 43

If $d(n)$ is the number of positive divisors of $n$, prove that there exists a natural number $n$ such that:
$$
\forall i \in \mathbb{N},\ i \le 1402 : \frac{d(n)}{d(n \pm i)} \gt 1401.
$$