Movatterモバイル変換

[0]ホーム
URL:

Jump to content
WikipediaThe Free Encyclopedia
Search

200 (number)

From Wikipedia, the free encyclopedia
Natural number
← 199200 201 →
Cardinaltwo hundred
Ordinal200th
(two hundredth)
Factorization23 × 52
Divisors1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200
Greek numeralΣ´
Roman numeralCC,cc
Binary110010002
Ternary211023
Senary5326
Octal3108
Duodecimal14812
HexadecimalC816
ArmenianՄ
Hebrewר
Babylonian cuneiform𒐗⟪
Egyptian hieroglyph𓍣

200 (two hundred) is thenatural number following199 and preceding201.

In mathematics

[edit]

200 is anabundant number, as 265, the sum of itsproper divisors, is greater than itself.

The number appears in thePadovan sequence, preceded by86,114, and151 (it is the sum of the first two of these).[1]

The sum ofEuler's totient function φ(x) over the first twenty-five integers is 200.

200 is the smallest base 10 unprimeable number – it cannot be turned into a prime number by changing just one of its digits to any other digit.[2] It is also aHarshad number.[3]

200 is anAchilles number.[4]

References

[edit]
Look uptwo hundred in Wiktionary, the free dictionary.
  1. ^"Sloane's A000931 : Padovan sequence".The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved2016-05-28.
  2. ^(sequenceA192545 in theOEIS)
  3. ^Sloane, N. J. A. (ed.)."Sequence A005349 (Niven (or Harshad, or harshad) numbers)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^Sloane, N. J. A. (ed.)."Sequence A052486 (Achilles numbers - powerful but imperfect: if n = Product(p_i^e_i) then all e_i > 1 (i.e., powerful), but the highest common factor of the e_i is 1, i.e., not a perfect power)".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
0 to 199
200 to 399
400 to 999
1000s and 10,000s
1000s
10,000s
100,000s to 10,000,000,000,000s
Retrieved from "https://en.wikipedia.org/w/index.php?title=200_(number)&oldid=1320591867"
Category:
Hidden categories:
[8]ページ先頭
©2009-2025 Movatter.jp