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

1. ## 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.

2. What do you mean by "what is it"? What kind of expression are you looking for?

3. May be?...

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

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

Kind regards

$\chi$ $\sigma$

4. Just what I wanted. Thanks!