If you can copy them, then paste them into your notepad app.
I believe notepad recognizes strings of digits as phone numbers. Or
just paste the number into a new contact.
Mmm ... yes, it works only when number is written in the right format.
I've just found this app, maybe it can be helpful: http://www.iphonesmartapps.org/?q=copyandcall
This app keeps the list of the numbers you copy into your clipboard. I recommend it.