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Consecutive positive divisors

Problem 179

Published on 26 January 2008 at 05:00 am [Server Time]

Find the number of integers 1 < n < 107, for which n and n + 1 have the same number of positive divisors. For example, 14 has the positive divisors 1, 2, 7, 14 while 15 has 1, 3, 5, 15.


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