the family members, relatives, and pets of a positive integer

(suggested new terminology)
Definition 1. The family members of a positive integer n are the divisors of n.
Definition 2. The relatives of a positive integer n are the positive integers not exceeding n that are not relatively prime to n.
Definition 3. The pets of a positive integer n are the positive integers not exceeding n that are relatively prime to n.
Remark: Euler’s phi function tells how many pets a given positive integer has.
keywords:
[Mathematics]
[Number Theory]
[divisibility]

the furlong

(suggested new terminology)
– an 8-month interval of time (this apparently being the minimum psychological ‘turn over’ time)
keywords:
[chronology]
[measurement]
[calendar]