IMO Shortlist 2016 problem C2


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Oct. 3, 2019
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Find all positive integers n for which all positive divisors of n can be put into the cells of a rectangular table under the following constraints: each cell contains a distinct divisor; the sums of all rows are equal; and the sums of all columns are equal.

Source: https://www.imo-official.org/problems/IMO2016SL.pdf