A:
Positive:
1 x 12877736311 x 1170703313 x 990595117 x 7575139143 x 900541187 x 688649221 x 5827032431 x 52973
Negative:
-1 x -128777363-11 x -11707033-13 x -9905951-17 x -7575139-143 x -900541-187 x -688649-221 x -582703-2431 x -52973
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 128,777,363, 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 | 128,777,363 | |
| -1 | -128,777,363 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 128,777,363.
Example:
1 x 128,777,363 = 128,777,363
and
-1 x -128,777,363 = 128,777,363
Notice both answers equal 128,777,363
With that explanation out of the way, let's continue. Next, we take the number 128,777,363 and divide it by 2:
128,777,363 ÷ 2 = 64,388,681.5
If the quotient is a whole number, then 2 and 64,388,681.5 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 | 128,777,363 | |
| -1 | -128,777,363 |
Now, we try dividing 128,777,363 by 3:
128,777,363 ÷ 3 = 42,925,787.6667
If the quotient is a whole number, then 3 and 42,925,787.6667 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 | 128,777,363 | |
| -1 | -128,777,363 |
Let's try dividing by 4:
128,777,363 ÷ 4 = 32,194,340.75
If the quotient is a whole number, then 4 and 32,194,340.75 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 | 128,777,363 | |
| -1 | 128,777,363 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 17 | 143 | 187 | 221 | 2,431 | 52,973 | 582,703 | 688,649 | 900,541 | 7,575,139 | 9,905,951 | 11,707,033 | 128,777,363 |
| -1 | -11 | -13 | -17 | -143 | -187 | -221 | -2,431 | -52,973 | -582,703 | -688,649 | -900,541 | -7,575,139 | -9,905,951 | -11,707,033 | -128,777,363 |
Here are some more numbers to try:
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