# Sorting the Values of Two Number Theoretic Functions

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The function (the Euler phi function of , also known as the totient function) gives the number of positive integers relatively prime to . For example, because 1, 3, 7, 9 are relatively prime to 10. The function is the sum of the divisors of . For example, because the divisors of 10 are 1, 2, 5, 10 and .

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Contributed by: George Beck (March 2011)

Open content licensed under CC BY-NC-SA

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