A:
Positive:
1 x 1188804897 x 1698292713 x 914465391 x 1306379593 x 2004732203 x 539634151 x 286397709 x 15421
Negative:
-1 x -118880489-7 x -16982927-13 x -9144653-91 x -1306379-593 x -200473-2203 x -53963-4151 x -28639-7709 x -15421
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 118,880,489, 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 | 118,880,489 | |
| -1 | -118,880,489 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 118,880,489.
Example:
1 x 118,880,489 = 118,880,489
and
-1 x -118,880,489 = 118,880,489
Notice both answers equal 118,880,489
With that explanation out of the way, let's continue. Next, we take the number 118,880,489 and divide it by 2:
118,880,489 ÷ 2 = 59,440,244.5
If the quotient is a whole number, then 2 and 59,440,244.5 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 | 118,880,489 | |
| -1 | -118,880,489 |
Now, we try dividing 118,880,489 by 3:
118,880,489 ÷ 3 = 39,626,829.6667
If the quotient is a whole number, then 3 and 39,626,829.6667 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 | 118,880,489 | |
| -1 | -118,880,489 |
Let's try dividing by 4:
118,880,489 ÷ 4 = 29,720,122.25
If the quotient is a whole number, then 4 and 29,720,122.25 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 | 118,880,489 | |
| -1 | 118,880,489 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 593 | 2,203 | 4,151 | 7,709 | 15,421 | 28,639 | 53,963 | 200,473 | 1,306,379 | 9,144,653 | 16,982,927 | 118,880,489 |
| -1 | -7 | -13 | -91 | -593 | -2,203 | -4,151 | -7,709 | -15,421 | -28,639 | -53,963 | -200,473 | -1,306,379 | -9,144,653 | -16,982,927 | -118,880,489 |
Here are some more numbers to try:
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