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87

86 ← 87 → 88
읽는 법팔십칠
세는 법여든일곱
한자八十七
소인수 분해3 × 29
로마 숫자LXXXVII
2진수10101112
3진수100203
4진수11134
5진수3225
6진수2236
8진수1278
12진수7312
16진수5716
20진수4720
36진수2F36
φ(87)56
σ*(87)120
d(87)4
σ(87)120
μ(87)1
M(87)-1
수 목록 · 정수

87(팔십칠)은 86보다 크고 88보다 작은 자연수이다.

수학

[편집]
  • 합성수로, 그 약수1, 3, 29, 87이다.
  • 2부터 7까지의 모든 소수들의 제곱의 합이다.

과학

[편집]

기타

[편집]

같이 보기

[편집]
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87
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