It would be very hard. The only way I can think of is to dig it up and cut the roots so each plant gets its share.

If some of these are pups (branches), they can be removed with a saw, remove all foliage and plant in containers of very well draining soil to root them during the warm season. I've never tried it though. You might have to read up on the technique.

A year ago, I removed about 18 pups from a 15 year old Sago. I took a recipricating saw and cut each one off at its base, close to the mother trunk. I put wound healer on the mother trunk and then fungicide on the raw part of the pups and planted them immediately. They did absolutely nothing but I just noticed the other day that the mother is sprouting fronds and about 1/2 the pups are too. The mother sago suffered extensive damage when my husband tried to dig it up, but it is sprouting, too.

It was much easier than I thought it would be and it is so exciting to see the fronds poking out!

I am gonna had my five cents worth. Until about five years ago I had no idea you could actually root a sago. But alas you live and learn or you live and remain stupid. I was working for a lady who wanted all the pups from the base and the trunk removed from her 3 foot trunked sago. So I went at it with a shovel. Some large pups over two foot of frond growth came away with a small amount of roots some the same size came away with just a piece of the base. all the pups on the trunk itself had of course no roots but these I had seen rooted before so I knew they would survive. I replanted the largest three pieces with partial roots in another bed for her. And Please leave the fronds attached until they yellow. A plant has to have chlorphyll and they have to photosynthesize, to do that they have to have foliage. So the three all grew new tops that same summer. I brought a massive car load of the remainder of pups etc home potted all of them they everyone rooted and survived. So yes cut off as low as possible without ruining the base of plant, You can cut the fronds half way back if they are in your way to get to base. I personally would say let them dry out one or two days in shade to form a callous which will help prevent rots or fungus. Then plant them where you want them, or pot them. Water only enough to keep moist not sloppy wet. If fronds do yellow then cut them off but do not despair sago's are some of the toughest plant I have ever encountered. Good luck. James Maloy

Here's good article from Cycad Jungle.

Here is a link that might be useful: Cycad Jungle