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Iannucci considered the positive divisors of a natural number $n$ that do notexceed $\sqrt{n}$ and found all forms of numbers whose such divisors are inarithmetic progression. In this paper, we generalize Iannucci's result byexcluding the trivial divisors $1$ and $\sqrt{n}$ (when $n$ is a square).Surprisingly, the length of our arithmetic progression cannot exceed $5$.

When the Nontrivial, Small Divisors of a Natural Number are in Arithmetic Progression