A:
Positive:
1 x 7864407655 x 15728815311 x 7149461553 x 1483850555 x 14298923265 x 2967701583 x 13489552915 x 269791
Negative:
-1 x -786440765-5 x -157288153-11 x -71494615-53 x -14838505-55 x -14298923-265 x -2967701-583 x -1348955-2915 x -269791
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 786,440,765, 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 | 786,440,765 | |
| -1 | -786,440,765 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 786,440,765.
Example:
1 x 786,440,765 = 786,440,765
and
-1 x -786,440,765 = 786,440,765
Notice both answers equal 786,440,765
With that explanation out of the way, let's continue. Next, we take the number 786,440,765 and divide it by 2:
786,440,765 ÷ 2 = 393,220,382.5
If the quotient is a whole number, then 2 and 393,220,382.5 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 | 786,440,765 | |
| -1 | -786,440,765 |
Now, we try dividing 786,440,765 by 3:
786,440,765 ÷ 3 = 262,146,921.6667
If the quotient is a whole number, then 3 and 262,146,921.6667 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 | 786,440,765 | |
| -1 | -786,440,765 |
Let's try dividing by 4:
786,440,765 ÷ 4 = 196,610,191.25
If the quotient is a whole number, then 4 and 196,610,191.25 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 | 786,440,765 | |
| -1 | 786,440,765 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 53 | 55 | 265 | 583 | 2,915 | 269,791 | 1,348,955 | 2,967,701 | 14,298,923 | 14,838,505 | 71,494,615 | 157,288,153 | 786,440,765 |
| -1 | -5 | -11 | -53 | -55 | -265 | -583 | -2,915 | -269,791 | -1,348,955 | -2,967,701 | -14,298,923 | -14,838,505 | -71,494,615 | -157,288,153 | -786,440,765 |
Here are some more numbers to try:
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