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15 relations: Centered square number, Centered triangular number, Decagonal number, Divisibility rule, Jacobsthal number, List of numbers, Octahedral number, Prime factor exponent notation, Smith number, Table of divisors, Table of prime factors, 5, 84 (number), 85, 86 (number).
Centered square number
In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers.
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Centered triangular number
A centered (or centred) triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers.
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Decagonal number
A decagonal number is a figurate number that extends the concept of triangular and square numbers to the decagon (a ten-sided polygon).
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Divisibility rule
A divisibility rule is a shorthand way of determining whether a given integer is divisible by a fixed divisor without performing the division, usually by examining its digits.
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Jacobsthal number
In mathematics, the Jacobsthal numbers are an integer sequence named after the German mathematician Ernst Jacobsthal.
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List of numbers
This is a list of articles about numbers (not about numerals).
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Octahedral number
In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close-packed spheres.
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Prime factor exponent notation
In his 1557 work The Whetstone of Witte, British mathematician Robert Recorde proposed an exponent notation by prime factorisation, which remained in use up until the eighteenth century and acquired the name Arabic exponent notation.
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Smith number
A Smith number is a composite number for which, in a given base (in base 10 by default), the sum of its digits is equal to the sum of the digits in its prime factorization.
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Table of divisors
The tables below list all of the divisors of the numbers 1 to 1000.
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Table of prime factors
The tables contain the prime factorization of the natural numbers from 1 to 1000.
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5
5 (five) is a number, numeral, and glyph.
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84 (number)
84 (eighty-four) is the natural number following 83 and preceding 85.
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85
85 may refer to.
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86 (number)
86 (eighty-six) is the natural number following 85 and preceding 87.
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