A:
Positive:
1 x 865058117 x 1235797329 x 2982959203 x 426137239 x 3619491673 x 517071783 x 485176931 x 12481
Negative:
-1 x -86505811-7 x -12357973-29 x -2982959-203 x -426137-239 x -361949-1673 x -51707-1783 x -48517-6931 x -12481
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 86,505,811, 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 | 86,505,811 | |
| -1 | -86,505,811 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,505,811.
Example:
1 x 86,505,811 = 86,505,811
and
-1 x -86,505,811 = 86,505,811
Notice both answers equal 86,505,811
With that explanation out of the way, let's continue. Next, we take the number 86,505,811 and divide it by 2:
86,505,811 ÷ 2 = 43,252,905.5
If the quotient is a whole number, then 2 and 43,252,905.5 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 | 86,505,811 | |
| -1 | -86,505,811 |
Now, we try dividing 86,505,811 by 3:
86,505,811 ÷ 3 = 28,835,270.3333
If the quotient is a whole number, then 3 and 28,835,270.3333 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 | 86,505,811 | |
| -1 | -86,505,811 |
Let's try dividing by 4:
86,505,811 ÷ 4 = 21,626,452.75
If the quotient is a whole number, then 4 and 21,626,452.75 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 | 86,505,811 | |
| -1 | 86,505,811 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 203 | 239 | 1,673 | 1,783 | 6,931 | 12,481 | 48,517 | 51,707 | 361,949 | 426,137 | 2,982,959 | 12,357,973 | 86,505,811 |
| -1 | -7 | -29 | -203 | -239 | -1,673 | -1,783 | -6,931 | -12,481 | -48,517 | -51,707 | -361,949 | -426,137 | -2,982,959 | -12,357,973 | -86,505,811 |
Here are some more numbers to try:
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