645 수학 과학 기타 둘러보기 메뉴eh추가해eh문서를 완성해
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정수
수 목록정수644646자연수
645
둘러보기로 가기
검색하러 가기
644 ← 645 → 646 | |
|---|---|
← 640 641 642 643 644 645 646 647 648 649 → ← 600 610 620 630 640 650 660 670 680 690 → ← 0 100 200 300 400 500 600 700 800 900 → | |
| 읽는 법 | 육백사십오 |
| 세는 법 | 육백마흔다섯 |
| 한자 | 六百四十五 |
| 소인수 분해 | 3 × 5 × 43 |
| 로마 숫자 | DCXLV |
| 2진수 | 10100001012 |
| 3진수 | 2122203 |
| 4진수 | 220114 |
| 5진수 | 100405 |
| 6진수 | 25536 |
| 8진수 | 12058 |
| 12진수 | 45912 |
| 16진수 | 28516 |
| 20진수 | 1C520 |
| 36진수 | HX36 |
| φ(645) | 336 |
| σ*(645) | 1056 |
d(645) | 8 |
| σ(645) | 1056 |
| μ(645) | -1 |
M(645) | -6 |
수 목록 · 정수 | |
645(육백사십오)는 644보다 크고 646보다 작은 자연수이다.
수학
합성수로, 그 약수는 1, 3, 5, 15, 43, 129, 215, 645이다.
과학
 이 문단은 비어있습니다. 내용을 추가해 주세요. |
기타
- 연도: 645년 기원전 645년
 | 이 글은 숫자에 관한 토막글입니다. 여러분의 지식으로 알차게 문서를 완성해 갑시다. |
분류:
- 정수
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