A:
Positive:
1 x 3876647117 x 55380673229 x 1692859257 x 1508423941 x 4119711603 x 2418371799 x 2154896587 x 58853
Negative:
-1 x -387664711-7 x -55380673-229 x -1692859-257 x -1508423-941 x -411971-1603 x -241837-1799 x -215489-6587 x -58853
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 387,664,711, 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 | 387,664,711 | |
| -1 | -387,664,711 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 387,664,711.
Example:
1 x 387,664,711 = 387,664,711
and
-1 x -387,664,711 = 387,664,711
Notice both answers equal 387,664,711
With that explanation out of the way, let's continue. Next, we take the number 387,664,711 and divide it by 2:
387,664,711 ÷ 2 = 193,832,355.5
If the quotient is a whole number, then 2 and 193,832,355.5 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 | 387,664,711 | |
| -1 | -387,664,711 |
Now, we try dividing 387,664,711 by 3:
387,664,711 ÷ 3 = 129,221,570.3333
If the quotient is a whole number, then 3 and 129,221,570.3333 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 | 387,664,711 | |
| -1 | -387,664,711 |
Let's try dividing by 4:
387,664,711 ÷ 4 = 96,916,177.75
If the quotient is a whole number, then 4 and 96,916,177.75 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 | 387,664,711 | |
| -1 | 387,664,711 |
If you did it right, you will end up with this table:
| 1 | 7 | 229 | 257 | 941 | 1,603 | 1,799 | 6,587 | 58,853 | 215,489 | 241,837 | 411,971 | 1,508,423 | 1,692,859 | 55,380,673 | 387,664,711 |
| -1 | -7 | -229 | -257 | -941 | -1,603 | -1,799 | -6,587 | -58,853 | -215,489 | -241,837 | -411,971 | -1,508,423 | -1,692,859 | -55,380,673 | -387,664,711 |
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