Using the Twitch Tools Followers tracker, you can generate a CSV spreadsheet that contains a list of all the users a channel is following, or a spreadsheet with all of the users following a specific channel.
The tool may take a while to run depending on how many users are following a specific channel. Warning:: This tool does use your internet connection to download all of the followers. If you are using a mobile network, you may want to consider connecting to WiFi since thousands of requests may be made.
If you want to figure out how long you have been following a specific channel, use the Twitch Tools Following Length tool instead. It's much faster than generating a full spreadsheet of all of the followers.