# Sum of integers from 1 to n that are relatively prime to n

• October 21st 2009, 02:16 PM
comssa
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.
• October 21st 2009, 07:29 PM
Bruno J.
What do you mean by "what is it"? What kind of expression are you looking for?
• October 21st 2009, 07:42 PM
chisigma
May be?...

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

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

Kind regards

$\chi$ $\sigma$
• October 21st 2009, 07:58 PM
comssa
Just what I wanted. Thanks!(Rock)