A:
Positive:
1 x 78736425731 x 2539884747 x 16752431179 x 43986831457 x 5404013019 x 2608035549 x 1418938413 x 93589
Negative:
-1 x -787364257-31 x -25398847-47 x -16752431-179 x -4398683-1457 x -540401-3019 x -260803-5549 x -141893-8413 x -93589
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 787,364,257, 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 | 787,364,257 | |
| -1 | -787,364,257 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 787,364,257.
Example:
1 x 787,364,257 = 787,364,257
and
-1 x -787,364,257 = 787,364,257
Notice both answers equal 787,364,257
With that explanation out of the way, let's continue. Next, we take the number 787,364,257 and divide it by 2:
787,364,257 ÷ 2 = 393,682,128.5
If the quotient is a whole number, then 2 and 393,682,128.5 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 | 787,364,257 | |
| -1 | -787,364,257 |
Now, we try dividing 787,364,257 by 3:
787,364,257 ÷ 3 = 262,454,752.3333
If the quotient is a whole number, then 3 and 262,454,752.3333 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 | 787,364,257 | |
| -1 | -787,364,257 |
Let's try dividing by 4:
787,364,257 ÷ 4 = 196,841,064.25
If the quotient is a whole number, then 4 and 196,841,064.25 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 | 787,364,257 | |
| -1 | 787,364,257 |
If you did it right, you will end up with this table:
| 1 | 31 | 47 | 179 | 1,457 | 3,019 | 5,549 | 8,413 | 93,589 | 141,893 | 260,803 | 540,401 | 4,398,683 | 16,752,431 | 25,398,847 | 787,364,257 |
| -1 | -31 | -47 | -179 | -1,457 | -3,019 | -5,549 | -8,413 | -93,589 | -141,893 | -260,803 | -540,401 | -4,398,683 | -16,752,431 | -25,398,847 | -787,364,257 |
Here are some more numbers to try:
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