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
.
Contributed by: George Beck (March 2011)
Open content licensed under CC BY-NC-SA
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