A:
Positive:
1 x 851711777 x 1216731113 x 655162991 x 935947197 x 4323411379 x 617632561 x 332574751 x 17927
Negative:
-1 x -85171177-7 x -12167311-13 x -6551629-91 x -935947-197 x -432341-1379 x -61763-2561 x -33257-4751 x -17927
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 85,171,177, 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 | 85,171,177 | |
| -1 | -85,171,177 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,171,177.
Example:
1 x 85,171,177 = 85,171,177
and
-1 x -85,171,177 = 85,171,177
Notice both answers equal 85,171,177
With that explanation out of the way, let's continue. Next, we take the number 85,171,177 and divide it by 2:
85,171,177 ÷ 2 = 42,585,588.5
If the quotient is a whole number, then 2 and 42,585,588.5 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 | 85,171,177 | |
| -1 | -85,171,177 |
Now, we try dividing 85,171,177 by 3:
85,171,177 ÷ 3 = 28,390,392.3333
If the quotient is a whole number, then 3 and 28,390,392.3333 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 | 85,171,177 | |
| -1 | -85,171,177 |
Let's try dividing by 4:
85,171,177 ÷ 4 = 21,292,794.25
If the quotient is a whole number, then 4 and 21,292,794.25 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 | 85,171,177 | |
| -1 | 85,171,177 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 197 | 1,379 | 2,561 | 4,751 | 17,927 | 33,257 | 61,763 | 432,341 | 935,947 | 6,551,629 | 12,167,311 | 85,171,177 |
| -1 | -7 | -13 | -91 | -197 | -1,379 | -2,561 | -4,751 | -17,927 | -33,257 | -61,763 | -432,341 | -935,947 | -6,551,629 | -12,167,311 | -85,171,177 |
Here are some more numbers to try:
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