Well I have 35 Direct ancestors, as in those that are mentioned in a pedigree (so Father, Grandmothers, 7xGreat Grandmothers etc.). If I include Siblings, Aunties and 5xGreat Grand Uncles the number is increased to around, hmm, well I'm not exactly sure...but if I include everyone in my tree who is blood related (cousins) then the number is around 1300 people. If I include by Marriage the number increases to around 1800 people.
Of course they are all estimates.