It is numerology, with impressive pedigree: sum-of-divisors and “perfect numbers” are in Euclid: https://en.wikipedia.org/w/index.php?title=Perfect_number&oldid

It is numerology, with impressive pedigree: sum-of-divisors and “perfect numbers” are in Euclid: https://en.wikipedia.org/w/index.php?title=Perfect_number&oldid=1166654700#History https://en.wikipedia.org/w/index.php?title=Perfect_number&ol... (for the numerology connection, search the page for "created in 6 days" and for "numerology"). See also https://en.wikipedia.org/w/index.php?title=William_of_Auberive&oldid=1069314286 https://en.wikipedia.org/w/index.php?title=William_of_Auberi... , and https://en.wikipedia.org/w/index.php?title=Aliquot_sum&oldid=1172322505 https://en.wikipedia.org/w/index.php?title=Aliquot_sum&oldid... which mentions: > The mathematicians Pollack & Pomerance (2016) noted that one of Erdős' "favorite subjects of investigation" was the aliquot sum function.