Relation between numbers


Prime Numbers

Numbers having factors and number itself are known as prime numbers.
As for example, take number .
Factors of are and
Therefore, is a prime number.


Composite Numbers

Composite numbers are numbers which have at least one factor other than number itself and .
Examples of composite number are   , , .
Factors of are


Fundamental Theorem of Arithmetic

Any integer greater than is either a prime number, or can be written as a unique product of prime numbers