Integers and the Fundamental Theorem of Arithmetic
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Integers are whole numbers - they can always be expressed as a product of their prime factors. Prime numbers are numbers divisible only by one and themselves. You can learn more about primes here. Factors of a number are numbers which can divide the number the whole number of times - and prime factors are factors of a number which are also primes. This is very important fact of mathematics - it means that the prime numbers really are the building blocks of every other integer numbers.
The Fundamental Theorem of Arithmetic states that every integer can be expressed as a product of its prime factors.
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