This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

約数

Reading

Kana: やくすう
Romaji: yakusuu
Kana
Romaji

Definition

1

divisor; factor; measure

Kanji

Readings: ヤク、 つづ.まる、 つづ.める、 つづま.やか
Meanings: promise, approximately, shrink
Readings: スウ、 ス、 サク、 ソク、 シュ、 かず、 かぞ.える、 しばしば、 せ.める、 わずらわ.しい
Meanings: number, strength, fate, law, figures

Example Sentence

90の約数(やくすう)のうち、9でわり()れない(かず)(なん)()あるでしょうか。
➥Among the divisors of 90, how many numbers are not divisible by 9?
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