A:
Positive:
1 x 850188655 x 1700377329 x 2931685145 x 586337167 x 509095835 x 1018193511 x 242154843 x 17555
Negative:
-1 x -85018865-5 x -17003773-29 x -2931685-145 x -586337-167 x -509095-835 x -101819-3511 x -24215-4843 x -17555
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 85,018,865, 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 | 85,018,865 | |
| -1 | -85,018,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,018,865.
Example:
1 x 85,018,865 = 85,018,865
and
-1 x -85,018,865 = 85,018,865
Notice both answers equal 85,018,865
With that explanation out of the way, let's continue. Next, we take the number 85,018,865 and divide it by 2:
85,018,865 ÷ 2 = 42,509,432.5
If the quotient is a whole number, then 2 and 42,509,432.5 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 | 85,018,865 | |
| -1 | -85,018,865 |
Now, we try dividing 85,018,865 by 3:
85,018,865 ÷ 3 = 28,339,621.6667
If the quotient is a whole number, then 3 and 28,339,621.6667 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 | 85,018,865 | |
| -1 | -85,018,865 |
Let's try dividing by 4:
85,018,865 ÷ 4 = 21,254,716.25
If the quotient is a whole number, then 4 and 21,254,716.25 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 | 85,018,865 | |
| -1 | 85,018,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 167 | 835 | 3,511 | 4,843 | 17,555 | 24,215 | 101,819 | 509,095 | 586,337 | 2,931,685 | 17,003,773 | 85,018,865 |
| -1 | -5 | -29 | -145 | -167 | -835 | -3,511 | -4,843 | -17,555 | -24,215 | -101,819 | -509,095 | -586,337 | -2,931,685 | -17,003,773 | -85,018,865 |
Here are some more numbers to try:
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