This list can be acquired by doing a Mail Merge of the group in question:
  1. Go to Data Management -> Mail Merge.
  2. Click Create a New Mail Merge.
  3. Fill out the required fields and choose which fields to include in the Mail Merge.
  4. Click Next Step.
  5. Choose the Administrator Group either by navigating to the Group Type using the Search option.
  6. Click Next Step.
  7. Click Confirm.

Once you have completed the Mail Merge, you will be able to download the list to a .csv file by clicking the disk icon.