Untouchable number

Noun

Definitions

1.NounA positive integer that cannot be expressed as the sum of all the proper divisors of any positive integer (including the untouchable number itself).

🔗 Find words with "untouchable number" in A2Z Word Finder

The Daily Word NerdA new word, a puzzle, and a fun fact — free in your inbox every morning.

Free forever · unsubscribe anytime · all 14 newsletters

That email did not go through — please check it and try again.