What are the values of phi (201212) and phi (111111)?
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So for example .
So factorise your numbers..
Yes 269 is prime.
I don't know how to use the symbols and I meant to say sigma function, not phi. So it would be sigma (201212) and sigma (111111)?
Since sigma is a multiplicative function where gcd(m,n)=1.
So for example,
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