(number theory) abundant number, a number that is smaller than the sum of its proper divisors

(number theory) perfect number, a positive integer that is equal to the sum of its positive divisors, excluding the number itself

(number theory) deficient number, a number for which the sum of proper divisors is less than that number

(number theory) amicable numbers, two different numbers related in such a way that the sum of the proper divisors of each is equal to the other number.

(Internet) play count

unlucky number

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

reasonable / just / natural / superb / outstanding / plausible

select / choose

table, desk, counter, tabletop