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A non-negative integer is a square number when its square root is again an integer. For example, =, so 9 is a square number. A positive integer that has no square divisors except 1 is called square-free. For a non-negative integer n, the n th square number is n 2, with 0 2 = 0 being the zeroth one. The concept of square can be extended to some ...
0–0 British English: nil-nil or nil all; American English: zero-zero or nothing-nothing, (occasionally scoreless or no score) 2–2 two-two or two all; American English also twos, two to two, even at two, or two up. Naming conventions of Tennis scores (and related sports) are different from other sports.
A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.
m is a divisor of n (also called m divides n, or n is divisible by m) if all prime factors of m have at least the same multiplicity in n. The divisors of n are all products of some or all prime factors of n (including the empty product 1 of no prime factors). The number of divisors can be computed by increasing all multiplicities by 1 and then ...
English. Read; Edit; View history ... Primes p for which p − 1 divides the square of the product of all earlier terms. 2, 3 ... All prime numbers from 31 to ...
41472 = 3-smooth number, number of reduced trees with 24 nodes [7] 41586 = Large Schröder number; 41616 = triangular square number [8] 41835 = Motzkin number [9] 41841 = 1/41841 = 0.0000239 is a repeating decimal with period 7
No square root can be taken of a negative number within the system of real numbers, because squares of all real numbers are non-negative. The lack of real square roots for the negative numbers can be used to expand the real number system to the complex numbers, by postulating the imaginary unit i, which is one of the square roots of −1.
The number appears in the Padovan sequence, preceded by 86, 114, 151 (it is the sum of the first two of these). [1] The sum of Euler'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.