Why an odd perfect number, if exists, is not divisble by 3?

[l-1j-cho]

So a number of mathematicans showed that an odd perfect number is not divisble by either 3, 5,or 7. I tried really hard to find a proof for that, but I haven't succeeded to do so.
Could anyone please help me to find a proof that an odd perfect nmber is not divisble by 3?

 

[l-1j-cho]

never mind. it might
be divisible by 3, 5, or 7

 

[mathwonk]

the result i recall is that an odd perfect number has at least 7 prime factors. that result is some 40 years old, and due i believe to carl pomerance.

 

[mathwonk]

according to wiki the lower bound is now up to 9 distinct prime factors.