Q: What are the factor combinations of the number 678,336?

 A:
Positive:   1 x 6783362 x 3391683 x 2261124 x 1695846 x 1130568 x 8479212 x 5652816 x 4239624 x 2826432 x 2119848 x 1413264 x 1059996 x 7066192 x 3533
Negative: -1 x -678336-2 x -339168-3 x -226112-4 x -169584-6 x -113056-8 x -84792-12 x -56528-16 x -42396-24 x -28264-32 x -21198-48 x -14132-64 x -10599-96 x -7066-192 x -3533


How do I find the factor combinations of the number 678,336?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 678,336, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 678,336
-1 -678,336

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 678,336.

Example:
1 x 678,336 = 678,336
and
-1 x -678,336 = 678,336
Notice both answers equal 678,336

With that explanation out of the way, let's continue. Next, we take the number 678,336 and divide it by 2:

678,336 ÷ 2 = 339,168

If the quotient is a whole number, then 2 and 339,168 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 339,168 678,336
-1 -2 -339,168 -678,336

Now, we try dividing 678,336 by 3:

678,336 ÷ 3 = 226,112

If the quotient is a whole number, then 3 and 226,112 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 3 226,112 339,168 678,336
-1 -2 -3 -226,112 -339,168 -678,336

Let's try dividing by 4:

678,336 ÷ 4 = 169,584

If the quotient is a whole number, then 4 and 169,584 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 3 4 169,584 226,112 339,168 678,336
-1 -2 -3 -4 -169,584 -226,112 -339,168 678,336
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

123468121624324864961923,5337,06610,59914,13221,19828,26442,39656,52884,792113,056169,584226,112339,168678,336
-1-2-3-4-6-8-12-16-24-32-48-64-96-192-3,533-7,066-10,599-14,132-21,198-28,264-42,396-56,528-84,792-113,056-169,584-226,112-339,168-678,336

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