A:
Positive:
1 x 3984735955 x 7969471913 x 3065181565 x 6130363113 x 3526315565 x 7052631469 x 2712557345 x 54251
Negative:
-1 x -398473595-5 x -79694719-13 x -30651815-65 x -6130363-113 x -3526315-565 x -705263-1469 x -271255-7345 x -54251
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 398,473,595, 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 | 398,473,595 | |
| -1 | -398,473,595 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 398,473,595.
Example:
1 x 398,473,595 = 398,473,595
and
-1 x -398,473,595 = 398,473,595
Notice both answers equal 398,473,595
With that explanation out of the way, let's continue. Next, we take the number 398,473,595 and divide it by 2:
398,473,595 ÷ 2 = 199,236,797.5
If the quotient is a whole number, then 2 and 199,236,797.5 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 | 398,473,595 | |
| -1 | -398,473,595 |
Now, we try dividing 398,473,595 by 3:
398,473,595 ÷ 3 = 132,824,531.6667
If the quotient is a whole number, then 3 and 132,824,531.6667 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 | 398,473,595 | |
| -1 | -398,473,595 |
Let's try dividing by 4:
398,473,595 ÷ 4 = 99,618,398.75
If the quotient is a whole number, then 4 and 99,618,398.75 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 | 398,473,595 | |
| -1 | 398,473,595 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 113 | 565 | 1,469 | 7,345 | 54,251 | 271,255 | 705,263 | 3,526,315 | 6,130,363 | 30,651,815 | 79,694,719 | 398,473,595 |
| -1 | -5 | -13 | -65 | -113 | -565 | -1,469 | -7,345 | -54,251 | -271,255 | -705,263 | -3,526,315 | -6,130,363 | -30,651,815 | -79,694,719 | -398,473,595 |
Here are some more numbers to try:
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