A:
Positive:
1 x 821453717 x 1173505311 x 746776129 x 283259977 x 1066823203 x 404657319 x 2575092233 x 36787
Negative:
-1 x -82145371-7 x -11735053-11 x -7467761-29 x -2832599-77 x -1066823-203 x -404657-319 x -257509-2233 x -36787
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 82,145,371, 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 | 82,145,371 | |
| -1 | -82,145,371 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 82,145,371.
Example:
1 x 82,145,371 = 82,145,371
and
-1 x -82,145,371 = 82,145,371
Notice both answers equal 82,145,371
With that explanation out of the way, let's continue. Next, we take the number 82,145,371 and divide it by 2:
82,145,371 ÷ 2 = 41,072,685.5
If the quotient is a whole number, then 2 and 41,072,685.5 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 | 82,145,371 | |
| -1 | -82,145,371 |
Now, we try dividing 82,145,371 by 3:
82,145,371 ÷ 3 = 27,381,790.3333
If the quotient is a whole number, then 3 and 27,381,790.3333 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 | 82,145,371 | |
| -1 | -82,145,371 |
Let's try dividing by 4:
82,145,371 ÷ 4 = 20,536,342.75
If the quotient is a whole number, then 4 and 20,536,342.75 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 | 82,145,371 | |
| -1 | 82,145,371 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 29 | 77 | 203 | 319 | 2,233 | 36,787 | 257,509 | 404,657 | 1,066,823 | 2,832,599 | 7,467,761 | 11,735,053 | 82,145,371 |
| -1 | -7 | -11 | -29 | -77 | -203 | -319 | -2,233 | -36,787 | -257,509 | -404,657 | -1,066,823 | -2,832,599 | -7,467,761 | -11,735,053 | -82,145,371 |
Here are some more numbers to try:
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