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421 수학 과학 기타 둘러보기 메뉴eh추가해eh문서를 완성해

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정수


수 목록정수420422자연수












421




위키백과, 우리 모두의 백과사전.






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420 ← 421 → 422


← 420 421 422 423 424 425 426 427 428 429 →
← 400 410 420 430 440 450 460 470 480 490 →



← 0 100 200 300 400 500 600 700 800 900 →

읽는 법
사백이십일
세는 법
사백스물하나
한자
四百二十一
소인수 분해
소수
로마 숫자
CDXXI
2진수
1101001012
3진수
1201213
4진수
122114
5진수
31415
6진수
15416
8진수
6458
12진수
2B112
16진수
1A516
20진수
11120
36진수
BP36
φ(421)
420
σ*(421)
422

d(421)

2
σ(421)
422
μ(421)
-1

M(421)

-2

수 목록 · 정수


v  d  e  h

421(사백이십일)은 420보다 크고 422보다 작은 자연수이다.



수학


  • 82번째 소수이다. 앞의 소수는 419이고, 다음은 431이다.


과학



기타


  • 날짜: 4월 21일

  • 연도: 421년 기원전 421년







원본 주소 "https://ko.wikipedia.org/w/index.php?title=421&oldid=23421723"










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