A:
Positive:
1 x 7684258197 x 109775117127 x 6050597889 x 864371907 x 847217953 x 8063236349 x 1210316671 x 115189
Negative:
-1 x -768425819-7 x -109775117-127 x -6050597-889 x -864371-907 x -847217-953 x -806323-6349 x -121031-6671 x -115189
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 768,425,819, 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 | 768,425,819 | |
| -1 | -768,425,819 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 768,425,819.
Example:
1 x 768,425,819 = 768,425,819
and
-1 x -768,425,819 = 768,425,819
Notice both answers equal 768,425,819
With that explanation out of the way, let's continue. Next, we take the number 768,425,819 and divide it by 2:
768,425,819 ÷ 2 = 384,212,909.5
If the quotient is a whole number, then 2 and 384,212,909.5 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 | 768,425,819 | |
| -1 | -768,425,819 |
Now, we try dividing 768,425,819 by 3:
768,425,819 ÷ 3 = 256,141,939.6667
If the quotient is a whole number, then 3 and 256,141,939.6667 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 | 768,425,819 | |
| -1 | -768,425,819 |
Let's try dividing by 4:
768,425,819 ÷ 4 = 192,106,454.75
If the quotient is a whole number, then 4 and 192,106,454.75 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 | 768,425,819 | |
| -1 | 768,425,819 |
If you did it right, you will end up with this table:
| 1 | 7 | 127 | 889 | 907 | 953 | 6,349 | 6,671 | 115,189 | 121,031 | 806,323 | 847,217 | 864,371 | 6,050,597 | 109,775,117 | 768,425,819 |
| -1 | -7 | -127 | -889 | -907 | -953 | -6,349 | -6,671 | -115,189 | -121,031 | -806,323 | -847,217 | -864,371 | -6,050,597 | -109,775,117 | -768,425,819 |
Here are some more numbers to try:
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