Q: What are the factor combinations of the number 29,670?

 A:
Positive:   1 x 296702 x 148353 x 98905 x 59346 x 494510 x 296715 x 197823 x 129030 x 98943 x 69046 x 64569 x 43086 x 345115 x 258129 x 230138 x 215
Negative: -1 x -29670-2 x -14835-3 x -9890-5 x -5934-6 x -4945-10 x -2967-15 x -1978-23 x -1290-30 x -989-43 x -690-46 x -645-69 x -430-86 x -345-115 x -258-129 x -230-138 x -215


How do I find the factor combinations of the number 29,670?

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 29,670, 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 29,670
-1 -29,670

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 29,670.

Example:
1 x 29,670 = 29,670
and
-1 x -29,670 = 29,670
Notice both answers equal 29,670

With that explanation out of the way, let's continue. Next, we take the number 29,670 and divide it by 2:

29,670 ÷ 2 = 14,835

If the quotient is a whole number, then 2 and 14,835 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 14,835 29,670
-1 -2 -14,835 -29,670

Now, we try dividing 29,670 by 3:

29,670 ÷ 3 = 9,890

If the quotient is a whole number, then 3 and 9,890 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 9,890 14,835 29,670
-1 -2 -3 -9,890 -14,835 -29,670

Let's try dividing by 4:

29,670 ÷ 4 = 7,417.5

If the quotient is a whole number, then 4 and 7,417.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

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

1 2 3 9,890 14,835 29,670
-1 -2 -3 -9,890 -14,835 29,670
Keep dividing by the next highest number until you cannot divide anymore.

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

1235610152330434669861151291382152302583454306456909891,2901,9782,9674,9455,9349,89014,83529,670
-1-2-3-5-6-10-15-23-30-43-46-69-86-115-129-138-215-230-258-345-430-645-690-989-1,290-1,978-2,967-4,945-5,934-9,890-14,835-29,670

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