A:
Positive:
1 x 8650580913 x 665429317 x 508857743 x 2011763221 x 391429559 x 154751731 x 1183399103 x 9503
Negative:
-1 x -86505809-13 x -6654293-17 x -5088577-43 x -2011763-221 x -391429-559 x -154751-731 x -118339-9103 x -9503
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 86,505,809, 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 | 86,505,809 | |
| -1 | -86,505,809 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,505,809.
Example:
1 x 86,505,809 = 86,505,809
and
-1 x -86,505,809 = 86,505,809
Notice both answers equal 86,505,809
With that explanation out of the way, let's continue. Next, we take the number 86,505,809 and divide it by 2:
86,505,809 ÷ 2 = 43,252,904.5
If the quotient is a whole number, then 2 and 43,252,904.5 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 | 86,505,809 | |
| -1 | -86,505,809 |
Now, we try dividing 86,505,809 by 3:
86,505,809 ÷ 3 = 28,835,269.6667
If the quotient is a whole number, then 3 and 28,835,269.6667 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 | 86,505,809 | |
| -1 | -86,505,809 |
Let's try dividing by 4:
86,505,809 ÷ 4 = 21,626,452.25
If the quotient is a whole number, then 4 and 21,626,452.25 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 | 86,505,809 | |
| -1 | 86,505,809 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 43 | 221 | 559 | 731 | 9,103 | 9,503 | 118,339 | 154,751 | 391,429 | 2,011,763 | 5,088,577 | 6,654,293 | 86,505,809 |
| -1 | -13 | -17 | -43 | -221 | -559 | -731 | -9,103 | -9,503 | -118,339 | -154,751 | -391,429 | -2,011,763 | -5,088,577 | -6,654,293 | -86,505,809 |
Here are some more numbers to try:
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