Listing All the Factors of a Whole Number

EXAMPLES:

Question: List all the factors of

$\,30\,$:

Answer:

$1\,$,$\,30\,$,$\,2\,$,$\,15\,$,$\,3\,$,$\,10\,$,$\,5\,$,$\,6\,$
For the computer to recognize your answer as correct,
you must list the factors in the order indicated in the example:

The factors occur in pairs that multiply together to give $\,30$
$1\,$ goes into $\,30\,$ evenly, giving the pair $\,1\,$,$\,30\,$.
You must write the smaller number first in each pair.
$2\,$ goes into $\,30\,$ evenly, giving the pair $\,2\,$,$\,15\,$
$3\,$ goes into $\,30\,$ evenly, giving the pair $\,3\,$,$\,10\,$
$4\,$ doesn't go into $\,30\,$ evenly
$5\,$ goes into $\,30\,$ evenly, giving the pair $\,5\,$,$\,6\,$
For this example, these are all the factors.
The numbers must be separated by commas; spaces are optional.

Question: List all the factors of $\,25\,$:

Answer: $1\,$,$\,25\,$,$\,5\,$
Only list the factor $\,5\,$ once.

Master the ideas from this section
by practicing the exercise at the bottom of this page.

When you're done practicing, move on to:
Finding the Greatest Common Factor of $\,2\,$ or $\,3\,$ Numbers

(MAX is 10; there are 10 different problem types.)