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21421 divided by 31, 691, gives no remainder. They are integers and prime numbers of 21421, they are also called composite number.
Prime factorization or integer factorization of a number is the determination of the set of prime integers which multiply together to give the original integer. It is also known as prime decomposition.
Prime number are numbers that can divide without remainder, This means that 21421 is divisible by 31, 691, numbers.
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