A:
Positive:
1 x 870573555 x 174114717 x 1243676511 x 791430535 x 248735355 x 158286177 x 1130615385 x 226123
Negative:
-1 x -87057355-5 x -17411471-7 x -12436765-11 x -7914305-35 x -2487353-55 x -1582861-77 x -1130615-385 x -226123
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 87,057,355, 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 | 87,057,355 | |
| -1 | -87,057,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,057,355.
Example:
1 x 87,057,355 = 87,057,355
and
-1 x -87,057,355 = 87,057,355
Notice both answers equal 87,057,355
With that explanation out of the way, let's continue. Next, we take the number 87,057,355 and divide it by 2:
87,057,355 ÷ 2 = 43,528,677.5
If the quotient is a whole number, then 2 and 43,528,677.5 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 | 87,057,355 | |
| -1 | -87,057,355 |
Now, we try dividing 87,057,355 by 3:
87,057,355 ÷ 3 = 29,019,118.3333
If the quotient is a whole number, then 3 and 29,019,118.3333 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 | 87,057,355 | |
| -1 | -87,057,355 |
Let's try dividing by 4:
87,057,355 ÷ 4 = 21,764,338.75
If the quotient is a whole number, then 4 and 21,764,338.75 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 | 87,057,355 | |
| -1 | 87,057,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 226,123 | 1,130,615 | 1,582,861 | 2,487,353 | 7,914,305 | 12,436,765 | 17,411,471 | 87,057,355 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -226,123 | -1,130,615 | -1,582,861 | -2,487,353 | -7,914,305 | -12,436,765 | -17,411,471 | -87,057,355 |
Here are some more numbers to try:
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