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30

29 ← 30 → 31
읽는 법삼십
세는 법서른
한자三十(卅)
소인수 분해2 × 3 × 5
로마 숫자XXX
2진수111102
3진수10103
4진수1324
5진수1105
6진수506
8진수368
12진수2612
16진수1E16
20진수1A20
36진수U36
φ(30)8
σ*(30)72
d(30)8
σ(30)72
μ(30)-1
M(30)-3
수 목록 · 정수

30(삼십)은 29보다 크고 31보다 작은 자연수이다.

수학

[편집]
  • 합성수로, 그 약수1, 2, 3, 5, 6, 10, 15, 30이다.
  • 연속하는 두 자연수 5, 6의 곱이다.
  • 연속하는 세 소수 2, 3, 5의 곱이다.
  • 300 이하의 10의 배수는 30개이다.

과학

[편집]

방송

[편집]

기타

[편집]
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30
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