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Old October 21st, 2009, 03:16 PM
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Default Sum of integers from 1 to n that are relatively prime to n

If n is a positive integer, what is the sum of the integers from 1 to n that are relatively prime to n? Thanks.
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  #2  
Old October 21st, 2009, 08:29 PM
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What do you mean by "what is it"? What kind of expression are you looking for?
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Old October 21st, 2009, 08:42 PM
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May be?...

http://en.wikipedia.org/wiki/Relatively_prime

http://en.wikipedia.org/wiki/Euler%27s_totient_function


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\chi \sigma
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Old October 21st, 2009, 08:58 PM
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Just what I wanted. Thanks!
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