Here is the official link. It is version 1.4.8 after all, so 148k is a very reasonable number to expect :-)
I it is definitely the only file you ever need for A1. You don’t even need jQuery, even if you _can_ load it, but Angular discourages you from doing it.
I haven’t used other libraries but the other numbers also feel excessive to me. Especially Angular 2 may well be possible to use as standalone, even if it may be hard to dig how.
Maybe you mean un-minified? ;-)
Note that un-minified, Angular 1 is huge because it contains all Doc pages as comments. Which as code reader, you really learn to appreciate!