220 and 284 (Amicable Numbers) - Numberphile

Why do 220 and 284 get along so well? Dr James Grime introduces us to the world of so-called amicable numbers. More links & stuff in full description below ↓↓↓ James has his own website at NUMBERPHILE Website: Numberphile on Facebook: Numberphile tweets: Subscribe: Videos by Brady Haran Patreon: Brady’s videos subreddit: Brady’s latest videos across all channels: Sign up for (occasional) emails: Numberphile T-Shirts: Other merchandise: