About: http://webisa.webdatacommons.org/255492511

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Here Phi(n) is the sum-of-divisors function: the sum of all positive divisors of n, including n itself.
http://www.w3.org/ns/prov#wasQuotedFrom	stereophile.com