I don't think you need to mention either that they were part-time or remote. I mean they were part of your team and you were managing them. But at the same time you don't want to artificially inflate your numbers beyond anything reasonable. Meaning if you have ten folks working for you part-time, then you are leading a team of ten. But if you have thirty people working for you for 2 hours a week and then five for 20, I'd say " I manage a team of five plus another 20 freelancers". or something like that. Yes, you want to promote yourself, and yes you want it to be honest.
If you like the post, give it a KUDOS!