RSS FeedUse secure connection
projecteuler.net

Consecutive positive divisors

Problem 179

Published on Saturday, 26th January 2008, 05:00 am; Solved by 6507

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.