Uploaded May 2024 | Updated September 2026, 2 weeks ago
Ben Sparks discusses aliquot sequences and why 276 holds a surprise. This video continues at youtu.be/Yh1QUYn2f3I and delves into so-called Untouchable Numbers. More links & stuff in full description below ↓↓↓
Ben Sparks: bensparks.co.uk
More Ben Sparks on Numberphile: bit.ly/Sparks_Playlist
Perfect Numbers on Numberphile: youtube.com/playlist?list=PLt5AfwLFPxWJILwhaYs0Cz76-XK4cu3WC
Amicable Numbers: youtu.be/fUSZBVYZdKY
GeoGebra file: geogebra.org/m/bkpq8uqp
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Our thanks also to the Simons Foundation: simonsfoundation.org
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Ben Sparks discusses aliquot sequences and why 276 holds a surprise. This video continues at youtu.be/Yh1QUYn2f3I and delves into so-called Untouchable Numbers. More links & stuff in full description below ↓↓↓
Ben Sparks: bensparks.co.uk
More Ben Sparks on Numberphile: bit.ly/Sparks_Playlist
Perfect Numbers on Numberphile: youtube.com/playlist?list=PLt5AfwLFPxWJILwhaYs0Cz76-XK4cu3WC
Amicable Numbers: youtu.be/fUSZBVYZdKY
GeoGebra file: geogebra.org/m/bkpq8uqp
Patreon: patreon.com/numberphile
Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: bit.ly/numberphile-janestreet
We're also supported by the Simons Laufer Mathematical Sciences Institute (formerly MSRI): bit.ly/MSRINumberphile
Our thanks also to the Simons Foundation: simonsfoundation.org
NUMBERPHILE
Website: numberphile.com
Numberphile on Facebook: facebook.com/numberphile
Numberphile tweets: twitter.com/numberphile
Subscribe: bit.ly/Numberphile_Sub
Videos by Brady Haran
Animation by Pete McPartlan
Numberphile T-Shirts and Merch: teespring.com/stores/numberphile
Brady's videos subreddit: reddit.com/r/BradyHaran
Brady's latest videos across all channels: bradyharanblog.com
Sign up for (occasional) emails: eepurl.com/YdjL9










