A:
Positive:
1 x 8489193117 x 499364361 x 139167171 x 11956611037 x 818631153 x 736271207 x 703334331 x 19601
Negative:
-1 x -84891931-17 x -4993643-61 x -1391671-71 x -1195661-1037 x -81863-1153 x -73627-1207 x -70333-4331 x -19601
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 84,891,931, 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 | 84,891,931 | |
| -1 | -84,891,931 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 84,891,931.
Example:
1 x 84,891,931 = 84,891,931
and
-1 x -84,891,931 = 84,891,931
Notice both answers equal 84,891,931
With that explanation out of the way, let's continue. Next, we take the number 84,891,931 and divide it by 2:
84,891,931 ÷ 2 = 42,445,965.5
If the quotient is a whole number, then 2 and 42,445,965.5 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 | 84,891,931 | |
| -1 | -84,891,931 |
Now, we try dividing 84,891,931 by 3:
84,891,931 ÷ 3 = 28,297,310.3333
If the quotient is a whole number, then 3 and 28,297,310.3333 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 | 84,891,931 | |
| -1 | -84,891,931 |
Let's try dividing by 4:
84,891,931 ÷ 4 = 21,222,982.75
If the quotient is a whole number, then 4 and 21,222,982.75 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 | 84,891,931 | |
| -1 | 84,891,931 |
If you did it right, you will end up with this table:
| 1 | 17 | 61 | 71 | 1,037 | 1,153 | 1,207 | 4,331 | 19,601 | 70,333 | 73,627 | 81,863 | 1,195,661 | 1,391,671 | 4,993,643 | 84,891,931 |
| -1 | -17 | -61 | -71 | -1,037 | -1,153 | -1,207 | -4,331 | -19,601 | -70,333 | -73,627 | -81,863 | -1,195,661 | -1,391,671 | -4,993,643 | -84,891,931 |
Here are some more numbers to try:
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