Medved was fond of quoting the Army Corps Of Engineers to the effect that they couldn't move such stones. I think the quote was from World War I.
I searched through my archives and found an exchange in which I provided Medved with the following link.
From the link:
With a maximum lifting capacity of 1600t and 22m radius, the Demag CC 12600 is the world's most powerful crawler crane with pick-and-carry capability. The 114m main boom can be combined with a 120m luffing or fixed jib to give a maximum hook height of 234 m! All the crane components have been optimised for effective transport logistics and can be easily assembled and dismantled.
The capacity stated (1600t) is 1600 TONS! Such a load can be picked up, moved, and raised to 234 meters. So, yes, handling these stones would be easy with today's technology...
Thank you so much, forsnax5, for putting this into the record. It does not go, however, to the problem of whether Egyptian technology in 2600 BC would be capable of lifting and moving 20-ton blocks. For, pace general_re, some of the stones of which the Great Pyramid of Khofu (Cheops) have been estimated to weigh that much.
Thanks so much for writing.