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22 relations: Centered nonagonal number, Euler's totient function, Happy number, Harmonic divisor number, Hexagonal number, Integer, List of minor planets: 8001–9000, Mersenne prime, Perfect number, Polygonal number, Triangular number, 1, 1000 (number), 127 (number), 16 (number), 2, 254 (number), 32 (number), 4, 500 (number), 64 (number), 8.
Centered nonagonal number
A centered nonagonal number is a centered figurate number that represents a nonagon with a dot in the center and all other dots surrounding the center dot in successive nonagonal layers.
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Euler's totient function
In number theory, Euler's totient function counts the positive integers up to a given integer that are relatively prime to.
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Happy number
A happy number is defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits in base-ten, and repeat the process until the number either equals 1 (where it will stay), or it loops endlessly in a cycle that does not include 1.
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Harmonic divisor number
In mathematics, a harmonic divisor number, or Ore number (named after Øystein Ore who defined it in 1948), is a positive integer whose divisors have a harmonic mean that is an integer.
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Hexagonal number
A hexagonal number is a figurate number.
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Integer
An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").
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List of minor planets: 8001–9000
#fefefe | 8193 Ciaurro || 1993 SF || September 17, 1993 || Stroncone || Santa Lucia Obs.
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Mersenne prime
In mathematics, a Mersenne prime is a prime number that is one less than a power of two.
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Perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself (also known as its aliquot sum).
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Polygonal number
In mathematics, a polygonal number is a number represented as dots or pebbles arranged in the shape of a regular polygon.
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Triangular number
A triangular number or triangle number counts objects arranged in an equilateral triangle, as in the diagram on the right.
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1
1 (one, also called unit, unity, and (multiplicative) identity) is a number, numeral, and glyph.
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1000 (number)
1000 or one thousand is the natural number following 999 and preceding 1001.
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127 (number)
127 (one hundred twenty-seven) is the natural number following 126 and preceding 128.
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16 (number)
16 (sixteen) is the natural number following 15 and preceding 17.
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2
2 (two) is a number, numeral, and glyph.
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254 (number)
254 (two hundred fifty-four) is the natural number following 253 and preceding 255.
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32 (number)
32 (thirty-two) is the natural number following 31 and preceding 33.
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4
4 (four) is a number, numeral, and glyph.
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500 (number)
500 (five hundred) is the natural number following 499 and preceding 501.
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64 (number)
64 (sixty-four) is the natural number following 63 and preceding 65.
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8
8 (eight) is the natural number following 7 and preceding 9.
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References
[1] https://en.wikipedia.org/wiki/8128_(number)
