수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 각 자리 숫자의 곱

△π 2020.04.12 06:49 조회 573

문제 푼 사람 1명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

양의 정수 n에 대하여, p(n)을 각 자리 숫자들 중 0이 아닌 숫자들의 곱이라고 정의하자.

$\sum_{i=1}^{999}p(i)$

의 가장 큰 소인수를 구하여라.

이전글 사람님...

다음글 모두 정수!

이 문제 어떠셨나요?

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도전

로보카폴리 Lv.11 2020.04.12 07:30 비밀댓글

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아인수타인 Lv.12 2020.04.12 07:59

시그마 밑에 i를 n으로 수정해야 할 거 같습니다. 아니면 p(i)로 하시든지요.

댓글 작성하기 좋아요0 댓글수1
- △π Lv.9 2020.04.12 15:43
  
  감사합니다. 수정되었습니다.
  
  좋아요0
도전

로보카폴리 Lv.11 2020.04.12 08:28 비밀댓글

확인요청중

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- △π Lv.9 2020.04.12 15:43 비밀댓글
  
  비밀 댓글이 등록 되었습니다!
해결

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sicma Lv.11 2020.04.20 21:53 비밀댓글

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