Untouchable Numbers - Numberphile

A continuation of our video about 276 and Aliquot Sequences with Ben Sparks. See the first part at    • An amazing thing about 276 - Numberphile   More links & stuff in full description below ↓↓↓ Ben Sparks: www.bensparks.co.uk/ More Ben Sparks on Numberphile: bit.ly/Sparks_Playlist Perfect Numbers on Numberphile:    • Perfect Numbers on Numberphile   Amicable Numbers:    • 220 and 284 (Amicable Numbers) - Numb...   Patreon: www.patreon.com/numberphile Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: www.janestreet.com/ We're also supported by the Simons Laufer Mathematical Sciences Institute (formerly MSRI): bit.ly/MSRINumberphile Our thanks also to the Simons Foundation: www.simonsfoundation.org/ NUMBERPHILE Website: www.numberphile.com/ Numberphile on Facebook: www.facebook.com/numberphile Numberphile tweets: twitter.com/numberphile Subscribe: bit.ly/Numberphile_Sub Videos by Brady Haran Animation and editing by Pete McPartlan Numberphile T-Shirts and Merch: teespring.com/stores/numberphile Brady's videos subreddit: www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: www.bradyharanblog.com/ Sign up for (occasional) emails: eepurl.com/YdjL9