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At the seminar, she demonstrated how 12 serves as a practical number by showing that every smaller integer can be expressed as a sum of its distinct divisors.
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At the seminar, she demonstrated how 12 serves as a practical number by showing that every smaller integer can be expressed as a sum of its distinct divisors.
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Related words
practical number
Noun
Japanese Meaning
任意の正の整数で、その約数（自分自身を除くことも含む）からなる一群の中から互いに重複しないものを選んで、その和で、すべての小さい正の整数（その数より小さい整数）を表現することができる整数。
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