A:
Positive:
1 x 1277129642 x 638564823 x 425709884 x 319282416 x 2128549412 x 10642747
Negative:
-1 x -127712964-2 x -63856482-3 x -42570988-4 x -31928241-6 x -21285494-12 x -10642747
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 127,712,964, it is easier to work with a table - it's called factoring from the outside in.
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 | 127,712,964 | |
| -1 | -127,712,964 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 127,712,964.
Example:
1 x 127,712,964 = 127,712,964
and
-1 x -127,712,964 = 127,712,964
Notice both answers equal 127,712,964
With that explanation out of the way, let's continue. Next, we take the number 127,712,964 and divide it by 2:
127,712,964 ÷ 2 = 63,856,482
If the quotient is a whole number, then 2 and 63,856,482 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 | 63,856,482 | 127,712,964 | |
| -1 | -2 | -63,856,482 | -127,712,964 |
Now, we try dividing 127,712,964 by 3:
127,712,964 ÷ 3 = 42,570,988
If the quotient is a whole number, then 3 and 42,570,988 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 | 42,570,988 | 63,856,482 | 127,712,964 | |
| -1 | -2 | -3 | -42,570,988 | -63,856,482 | -127,712,964 |
Let's try dividing by 4:
127,712,964 ÷ 4 = 31,928,241
If the quotient is a whole number, then 4 and 31,928,241 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 | 31,928,241 | 42,570,988 | 63,856,482 | 127,712,964 | |
| -1 | -2 | -3 | -4 | -31,928,241 | -42,570,988 | -63,856,482 | 127,712,964 |
If you did it right, you will end up with this table:
| 1 | 2 | 3 | 4 | 6 | 12 | 10,642,747 | 21,285,494 | 31,928,241 | 42,570,988 | 63,856,482 | 127,712,964 |
| -1 | -2 | -3 | -4 | -6 | -12 | -10,642,747 | -21,285,494 | -31,928,241 | -42,570,988 | -63,856,482 | -127,712,964 |
Here are some more numbers to try:
Try the factor calculator