This verse is built around a play on words, two forms of the word "give," one translated as "delivered/handed over" and the other translated as "pay/pay back." The end echoes the end of Matthew 18:30 so this lord/master copies what the slave demanded quite literally. The sense is that "as you do it shall be done to you."
Also lost is the idea that the master wanted to find out more about the assets of the slave. The word "tormenters" or "jailers" means "examiners," "testers," or "questioners" but the idea was the questioning was done using various motivating techniques to get people to talk. The point is that the master wanted this man questioned about his finances. He had hidden his assets, the debts owed to him by others, until his debt to his master was forgiven. The lord assumes that more was hidden.
Christ's Words in Matthew as a Guide to 40 Days of Prayer.