A:
Positive:
1 x 8538760113 x 656827737 x 2307773167 x 511303481 x 1775211063 x 803272171 x 393316179 x 13819
Negative:
-1 x -85387601-13 x -6568277-37 x -2307773-167 x -511303-481 x -177521-1063 x -80327-2171 x -39331-6179 x -13819
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 85,387,601, 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 | 85,387,601 | |
| -1 | -85,387,601 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 85,387,601.
Example:
1 x 85,387,601 = 85,387,601
and
-1 x -85,387,601 = 85,387,601
Notice both answers equal 85,387,601
With that explanation out of the way, let's continue. Next, we take the number 85,387,601 and divide it by 2:
85,387,601 ÷ 2 = 42,693,800.5
If the quotient is a whole number, then 2 and 42,693,800.5 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 | 85,387,601 | |
| -1 | -85,387,601 |
Now, we try dividing 85,387,601 by 3:
85,387,601 ÷ 3 = 28,462,533.6667
If the quotient is a whole number, then 3 and 28,462,533.6667 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 | 85,387,601 | |
| -1 | -85,387,601 |
Let's try dividing by 4:
85,387,601 ÷ 4 = 21,346,900.25
If the quotient is a whole number, then 4 and 21,346,900.25 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 | 85,387,601 | |
| -1 | 85,387,601 |
If you did it right, you will end up with this table:
| 1 | 13 | 37 | 167 | 481 | 1,063 | 2,171 | 6,179 | 13,819 | 39,331 | 80,327 | 177,521 | 511,303 | 2,307,773 | 6,568,277 | 85,387,601 |
| -1 | -13 | -37 | -167 | -481 | -1,063 | -2,171 | -6,179 | -13,819 | -39,331 | -80,327 | -177,521 | -511,303 | -2,307,773 | -6,568,277 | -85,387,601 |
Here are some more numbers to try:
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