A:
Positive:
1 x 81457220911 x 7405201923 x 3541618383 x 9814123253 x 3219653913 x 8921931909 x 42670120999 x 38791
Negative:
-1 x -814572209-11 x -74052019-23 x -35416183-83 x -9814123-253 x -3219653-913 x -892193-1909 x -426701-20999 x -38791
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 814,572,209, 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 | 814,572,209 | |
| -1 | -814,572,209 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 814,572,209.
Example:
1 x 814,572,209 = 814,572,209
and
-1 x -814,572,209 = 814,572,209
Notice both answers equal 814,572,209
With that explanation out of the way, let's continue. Next, we take the number 814,572,209 and divide it by 2:
814,572,209 ÷ 2 = 407,286,104.5
If the quotient is a whole number, then 2 and 407,286,104.5 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 | 814,572,209 | |
| -1 | -814,572,209 |
Now, we try dividing 814,572,209 by 3:
814,572,209 ÷ 3 = 271,524,069.6667
If the quotient is a whole number, then 3 and 271,524,069.6667 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 | 814,572,209 | |
| -1 | -814,572,209 |
Let's try dividing by 4:
814,572,209 ÷ 4 = 203,643,052.25
If the quotient is a whole number, then 4 and 203,643,052.25 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 | 814,572,209 | |
| -1 | 814,572,209 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 83 | 253 | 913 | 1,909 | 20,999 | 38,791 | 426,701 | 892,193 | 3,219,653 | 9,814,123 | 35,416,183 | 74,052,019 | 814,572,209 |
| -1 | -11 | -23 | -83 | -253 | -913 | -1,909 | -20,999 | -38,791 | -426,701 | -892,193 | -3,219,653 | -9,814,123 | -35,416,183 | -74,052,019 | -814,572,209 |
Here are some more numbers to try:
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