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183 (number)
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183 (number) : ウィキペディア英語版
183 (number)

183 (one hundred () eighty-three) is the natural number following 182 and preceding 184.
==In mathematics==

* 183 is an odd number
* 183 is a central polygonal number, n^2 - n + 1, where n=14 ()
* 183 is a composite number
* 183 is a deficient number, as 65 is less than 183
* 183 is a perfect totient number equal to the sum of its iterated totients
* 183 is a repdigit number in base 13 (111)
* 183 is a semiprime number, (also called biprime, or 2-almost prime, or pq number), a natural number that is the product of two prime numbers
* 183 is a square-free number
* 183 is the difference of 2 square numbers: 322 - 292
* 183 has 4 divisors: 1, 3, 61, 183
* 183 is a number of points in projective plane over the Galois field GF(13)
* 183 is a 62-gonal number

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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