Actually, all the popes before Liberius (number 36) were canonized, as were the 37th through to the 49th popes. To make it simpler, the following popes, by number, rather than name, and including the ones you have already, are considered saints:

1-35
37-49
51-54
57-58
64
67-68
74-76
79-81
84
89-91
93
96
98
103
105
109
152
157
192
225
257
and of course, 261 and 264, whom you just added.

The following popes have been beautified and have the title "Blessed" (Bl.):

158-159
167
184-185
200
240

I do not know that by memory--I have a list of popes (it isn't as good as yours is, however, since it doesn't have the exact dates of their reigns).

Have fun changing them all (if you care to do so), and...sorry. ;)