Soverihn laid the points in Colombia's favor out better than I could, and I'd also add that a common religion and growing national identity will also really help. The country will not be able to centralize quite yet, but once technology advances and regions become better connected it will become easier. Right now, Colombia is comparable in size to Russia and various Chinese dynasties, though I know their situations are quite different. At least Colombia will have shorter travel times due to the oceans and seas to connect their far-flung provinces, unlike either of the other empires.
Thank you for the information