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Write all the factors of $20$ . Use commas to separate them.

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Prime factorization with exponents

Full solution

Q. Write all the factors of

20

. Use commas to separate them.

Identify number: Identify the number to find factors for; in this case, it's $20$ .
Start with $1$ : Start with the smallest factor, which is $1$ . $20$ divided by $1$ equals $20$ , so $1$ and $20$ are factors.
Check next number: Check the next smallest number, $2$ . $20$ divided by $2$ equals $10$ , so $2$ and $10$ are factors.
Move to $3$ : Move to the next number, $3$ . $20$ divided by $3$ is not a whole number, so $3$ is not a factor.
Check number $4$ : Check number $4$ . $20$ divided by $4$ equals $5$ , so $4$ and $5$ are factors.
Stop at factor: Since we've reached a factor ( $5$ ) that when squared gives the original number ( $5\times4=20$ ), we stop here.

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