That is actually a two-part answer. The largest number of men I have done where I was the only woman involved was a 28 man Gang-Bang I did about 6 months ago. I fucked every guy, multiple times, and swallowed close to 60 loads of CUM.
I also did a 57 man, 11 woman Orgy back about 10 years ago where I sucked every guy and fucked about 40 of them. That video is on my website 😉