Definition of amicable numbers in English:

amicable numbers

plural noun

Mathematics
  • A pair of numbers, each of which is the sum of the factors of the other (e.g. 220 and 284).

    • ‘Today, the tally of known amicable numbers has grown to about two and half million.’
    • ‘One particular interest involved what we now call amicable numbers.’
    • ‘The Pythagoreans were also interested in what we now call amicable numbers - pairs in which each number is the sum of the proper divisors of the other.’