A:
Positive:
1 x 80837742117 x 4755161331 x 2607669183 x 9739487527 x 15339231411 x 5729112573 x 31417718481 x 43741
Negative:
-1 x -808377421-17 x -47551613-31 x -26076691-83 x -9739487-527 x -1533923-1411 x -572911-2573 x -314177-18481 x -43741
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 808,377,421, 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 | 808,377,421 | |
| -1 | -808,377,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 808,377,421.
Example:
1 x 808,377,421 = 808,377,421
and
-1 x -808,377,421 = 808,377,421
Notice both answers equal 808,377,421
With that explanation out of the way, let's continue. Next, we take the number 808,377,421 and divide it by 2:
808,377,421 ÷ 2 = 404,188,710.5
If the quotient is a whole number, then 2 and 404,188,710.5 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 | 808,377,421 | |
| -1 | -808,377,421 |
Now, we try dividing 808,377,421 by 3:
808,377,421 ÷ 3 = 269,459,140.3333
If the quotient is a whole number, then 3 and 269,459,140.3333 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 | 808,377,421 | |
| -1 | -808,377,421 |
Let's try dividing by 4:
808,377,421 ÷ 4 = 202,094,355.25
If the quotient is a whole number, then 4 and 202,094,355.25 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 | 808,377,421 | |
| -1 | 808,377,421 |
If you did it right, you will end up with this table:
| 1 | 17 | 31 | 83 | 527 | 1,411 | 2,573 | 18,481 | 43,741 | 314,177 | 572,911 | 1,533,923 | 9,739,487 | 26,076,691 | 47,551,613 | 808,377,421 |
| -1 | -17 | -31 | -83 | -527 | -1,411 | -2,573 | -18,481 | -43,741 | -314,177 | -572,911 | -1,533,923 | -9,739,487 | -26,076,691 | -47,551,613 | -808,377,421 |
Here are some more numbers to try:
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