On the ratio of the sum of divisors and Euler’s totient function II
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© 2014 copyright with the authors.
Abstract
We find the form of all solutions to ø(n) | σ(n) with three or fewer prime factors, except when the quotient is 4 and n is even.
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Broughan, K. A., & Zhou, Q. (2014). On the ratio of the sum of divisors and Euler’s totient function II. Journal of Integer Sequences, 17(9), Article 14.9.2.
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University of Waterloo