I forgot how to prove the following, can anyone jog my memory:(adsbygoogle = window.adsbygoogle || []).push({});

Let m,n be natural numbers s.t. gcd(m,n) = 1 and n|k and m|k for some natural number k.

Then nm|k.

I know I'll kick myself when I find out. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Very easy question

**Physics Forums | Science Articles, Homework Help, Discussion**