Hello and welcome. I hope you find homes for your litter. If you need any help sexing them ready to separate, just shout - there are some experienced breeders on here.
There is some very good information on this Robo breeder's page below. I take it you have taken the Dad robo out of the cage when you found the litter? Apparently the babies can be separated from the Mum at 3 weeks and then the boys need separating from the girls at 4 weeks old. There is also some very good info on how to sex them on that page (second link).
. Oak Farm Roborovskis
Oak Farm Roborovskis
So you'll probably need 4 cages/bin cages - maybe 5. Before they can go to their new homes. One cage for Mum, one for Dad, one for the girls and one for the boys. The fifth one spare in case you have a robo you can't sex and that one will need to be separate.
The main thing is to make sure boys and girls are separated at four weeks, or they can mate if left together.
How old are they now? Edit - noticed you said Robo singular so no Dad to separate