That cannot be determined. There owuld be variables such as
Amount of work force
injuries
heaviness of bricks
time that people work on it
AND MORE
It is estimated that the Great Pyramid took 20 years to build.
It all depends on the size of the structure and the materials used. A small mud brick pyramid from the middle kingdom could be thrown up in a year. The great stone pyramid of king Khufu on the other hand is said to have taken 20 years to build.
About 20 years for the Great Pyramid other smaller pyramids take less time.
Modern estimates put it at 14 to 20 years
look at "how do you make a pyramid?" to see
If you're trying to build just the pyramid. you can make it with tooth picks and a hot glue gun. It is pretty simple.
make a pyramid out of food
pyramid
It took over 500 blocks to make pyramid.
To make a pyramid you go to the reject shop and buy one.
Use styrofoam and carve the details into it. Then saran wrap some tooth picks in the shape of the pyramid.
The answer depends on which pyramid. Geometrically, one stone makes a pyramid - a trivial one. Four make a proper pyramid.