Q: What are the factor combinations of the number 201,000,020?

 A:
Positive:   1 x 2010000202 x 1005000104 x 502500055 x 4020000410 x 2010000213 x 1546154020 x 1005000126 x 773077052 x 386538559 x 340678065 x 3092308118 x 1703390130 x 1546154236 x 851695260 x 773077295 x 681356590 x 340678767 x 2620601180 x 1703391534 x 1310303068 x 655153835 x 524127670 x 2620613103 x 15340
Negative: -1 x -201000020-2 x -100500010-4 x -50250005-5 x -40200004-10 x -20100002-13 x -15461540-20 x -10050001-26 x -7730770-52 x -3865385-59 x -3406780-65 x -3092308-118 x -1703390-130 x -1546154-236 x -851695-260 x -773077-295 x -681356-590 x -340678-767 x -262060-1180 x -170339-1534 x -131030-3068 x -65515-3835 x -52412-7670 x -26206-13103 x -15340


How do I find the factor combinations of the number 201,000,020?

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 201,000,020, 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.

1 201,000,020
-1 -201,000,020

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 201,000,020.

Example:
1 x 201,000,020 = 201,000,020
and
-1 x -201,000,020 = 201,000,020
Notice both answers equal 201,000,020

With that explanation out of the way, let's continue. Next, we take the number 201,000,020 and divide it by 2:

201,000,020 ÷ 2 = 100,500,010

If the quotient is a whole number, then 2 and 100,500,010 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 2 100,500,010 201,000,020
-1 -2 -100,500,010 -201,000,020

Now, we try dividing 201,000,020 by 3:

201,000,020 ÷ 3 = 67,000,006.6667

If the quotient is a whole number, then 3 and 67,000,006.6667 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 2 100,500,010 201,000,020
-1 -2 -100,500,010 -201,000,020

Let's try dividing by 4:

201,000,020 ÷ 4 = 50,250,005

If the quotient is a whole number, then 4 and 50,250,005 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 4 50,250,005 100,500,010 201,000,020
-1 -2 -4 -50,250,005 -100,500,010 201,000,020
Keep dividing by the next highest number until you cannot divide anymore.

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

1245101320265259651181302362602955907671,1801,5343,0683,8357,67013,10315,34026,20652,41265,515131,030170,339262,060340,678681,356773,077851,6951,546,1541,703,3903,092,3083,406,7803,865,3857,730,77010,050,00115,461,54020,100,00240,200,00450,250,005100,500,010201,000,020
-1-2-4-5-10-13-20-26-52-59-65-118-130-236-260-295-590-767-1,180-1,534-3,068-3,835-7,670-13,103-15,340-26,206-52,412-65,515-131,030-170,339-262,060-340,678-681,356-773,077-851,695-1,546,154-1,703,390-3,092,308-3,406,780-3,865,385-7,730,770-10,050,001-15,461,540-20,100,002-40,200,004-50,250,005-100,500,010-201,000,020

More Examples

Here are some more numbers to try:

201,000,018201,000,019201,000,021201,000,022
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