Removing the noise of a computer fan from an audio recording?

We had to record the latest episode of our podcast on my MacBook Pro, on my lap. Unfortunately without realising, my leg was blocking the vent and the fan kicked in to compensate.

Although we didn’t notice the sound of the fan while we were recording, we got to the end of the hour to discover that the microphone picked up the fans amazingly well and it sounds like we’re on a plane.

Any suggestions as to how I can remove the fan audio? Thanks!