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18 relations: Atomic number, Cyclotomic polynomial, Dodecagonal number, Double factorial, Dubnium, List of highways numbered 105, Natural number, Prime number, Prime quadruplet, Pseudoprime, Ruth–Aaron pair, Sphenic number, Square pyramidal number, The Penguin Dictionary of Curious and Interesting Numbers, Triangular number, Zeisel number, 104 (number), 106 (number).
Atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.
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Cyclotomic polynomial
In mathematics, more specifically in algebra, the nth cyclotomic polynomial, for any positive integer n, is the unique irreducible polynomial with integer coefficients that is a divisor of x^n-1 and is not a divisor of x^k-1 for any.
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Dodecagonal number
A dodecagonal number is a figurate number that represents a dodecagon.
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Double factorial
In mathematics, the double factorial or semifactorial of a number (denoted by) is the product of all the integers from 1 up to that have the same parity (odd or even) as.
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Dubnium
Dubnium is a synthetic chemical element with symbol Db and atomic number 105.
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List of highways numbered 105
Route 105 or Highway 105 may refer to.
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Natural number
In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country").
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Prime number
A prime number (or a prime) is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.
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Prime quadruplet
A prime quadruplet (sometimes called prime quadruple) is a set of four primes of the form.
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Pseudoprime
A pseudoprime is a probable prime (an integer that shares a property common to all prime numbers) that is not actually prime.
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Ruth–Aaron pair
In mathematics, a Ruth–Aaron pair consists of two consecutive integers (e.g., 714 and 715) for which the sums of the prime factors of each integer are equal: and There are different variations in the definition, depending on how many times to count primes that appear multiple times in a factorization.
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Sphenic number
In number theory, a sphenic number (from σφήνα, 'wedge') is a positive integer that is the product of three distinct prime numbers.
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Square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents the number of stacked spheres in a pyramid with a square base.
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The Penguin Dictionary of Curious and Interesting Numbers
The Penguin Dictionary of Curious and Interesting Numbers is a reference book for recreational mathematics and elementary number theory written by David Wells.
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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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Zeisel number
A Zeisel number, named after Helmut Zeisel, is a square-free integer k with at least three prime factors which fall into the pattern where a and b are some integer constants and x is the index number of each prime factor in the factorization, sorted from lowest to highest.
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104 (number)
104 (one hundred four) is the natural number following 103 and preceding 105.
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106 (number)
106 (one hundred six) is the natural number following 105 and preceding 107.
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