Integer.
Publié le 12/05/2013
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Integer. Integer, any number that is a natural number (the counting numbers 1, 2, 3, 4, ...), a negative of a natural number (-1, -2, -3, -4, ...), or zero. A large proportion of mathematics has been devoted to integers because of their immediate application to real situations. Any integer greater than 1 that is divisible only by itself and 1 is called a prime number (see Number Theory). Every integer has a unique set of prime factors, that is, a list of prime numbers that when multiplied together produce the integer concerned. For example, the prime factors of the integer 42 are 2, 3, and 7. Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.