Meanings
nounamicable number (plural amicable numbers)
plural amicable numbers
- mathematicsOne of a pair of numbers having the property that the sum of the divisors of each, excluding itself, is equal to the other number.
The factors of 220, excluding 220 itself, are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110 and sum to 284; the factors of 284, excluding 284 itself, are 1, 2, 4, 71, and 142, and sum to 220; hence 220 and 284 are amicable numbers.
Translations
Catalan nombres amics
- nombres amicsnumber theory
Chinese Mandarin 相親數 /相亲数, 親和數 /亲和数
- 相親數 /相亲数 (xiāngqīnshù)number theory
- 親和數 /亲和数 (qīnhéshù)number theory
Finnish ystäväluku
- ystävälukunumber theory
French nombres amicaux
- nombres amicauxnumber theory
German befreundete Zahlen
- befreundete Zahlennumber theory
Hebrew מספר ידידותי
- מספר ידידותיnumber theory
Hungarian barátságos számok
- barátságos számoknumber theory
Italian numero amicabile
- numero amicabilenumber theory
Japanese 友愛数
- 友愛数 (yūaisū)number theory
Korean 친화수
- 친화수 (chinhwasu)number theory
Latin numerus amīcābilis
- numerus amīcābilisnumber theory
Polish liczby zaprzyjaźniona
- liczby zaprzyjaźnionanumber theory
Portuguese número amigo, número amigável
- número amigonumber theory
- número amigávelnumber theory
Spanish números amigos
- números amigosnumber theory
Swedish vänskapliga tal
- vänskapliga talnumber theory
Cite this entry
APA
amicable number. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/amicable%20number
MLA
“amicable number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/amicable%20number. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “amicable number,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/amicable%20number.
Source: amicable number on Wiktionary, CC BY-SA 4.0.