278

277 ← 278 → 279
읽는 법이백칠십팔
세는 법이백일흔여덟
한자二百七十八
소인수 분해2 × 139
로마 숫자CCLXXVIII
2진수1000101102
3진수1010223
4진수101124
5진수21035
6진수11426
8진수4268
12진수1B212
16진수11616
20진수DI20
36진수7Q36
φ(278)138
σ*(278)420
d(278)4
σ(278)420
μ(278)1
M(278)5
수 목록 · 정수

278(이백칠십팔)은 277보다 크고 279보다 작은 자연수다.

수학

  • 합성수로, 그 약수1, 2, 139, 278이다. 진약수의 합142이므로, 278은 부족수다.
    • 88번째 반소수다. 앞의 반소수는 274, 다음 반소수는 287이다.
  • 은 278로 나누어떨어진다.

과학

교통

군사

문화유산

방송

기타

각주

  1. 보물 제1657호로 강등되었다.
  1. 단, 스카이라이프는 187번, 지니 TV는 239번, B tv는 299번이다.

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