A:
Positive:
1 x 858012855 x 1716025729 x 2958665145 x 591733157 x 546505785 x 1093013769 x 227654553 x 18845
Negative:
-1 x -85801285-5 x -17160257-29 x -2958665-145 x -591733-157 x -546505-785 x -109301-3769 x -22765-4553 x -18845
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 85,801,285, 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 | 85,801,285 | |
| -1 | -85,801,285 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,801,285.
Example:
1 x 85,801,285 = 85,801,285
and
-1 x -85,801,285 = 85,801,285
Notice both answers equal 85,801,285
With that explanation out of the way, let's continue. Next, we take the number 85,801,285 and divide it by 2:
85,801,285 ÷ 2 = 42,900,642.5
If the quotient is a whole number, then 2 and 42,900,642.5 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 | 85,801,285 | |
| -1 | -85,801,285 |
Now, we try dividing 85,801,285 by 3:
85,801,285 ÷ 3 = 28,600,428.3333
If the quotient is a whole number, then 3 and 28,600,428.3333 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 | 85,801,285 | |
| -1 | -85,801,285 |
Let's try dividing by 4:
85,801,285 ÷ 4 = 21,450,321.25
If the quotient is a whole number, then 4 and 21,450,321.25 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 | 85,801,285 | |
| -1 | 85,801,285 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 157 | 785 | 3,769 | 4,553 | 18,845 | 22,765 | 109,301 | 546,505 | 591,733 | 2,958,665 | 17,160,257 | 85,801,285 |
| -1 | -5 | -29 | -145 | -157 | -785 | -3,769 | -4,553 | -18,845 | -22,765 | -109,301 | -546,505 | -591,733 | -2,958,665 | -17,160,257 | -85,801,285 |
Here are some more numbers to try:
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