A:
Positive:
1 x 861435055 x 172287017 x 1230621517 x 506726535 x 246124385 x 1013453119 x 723895595 x 144779
Negative:
-1 x -86143505-5 x -17228701-7 x -12306215-17 x -5067265-35 x -2461243-85 x -1013453-119 x -723895-595 x -144779
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 86,143,505, 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 | 86,143,505 | |
| -1 | -86,143,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,143,505.
Example:
1 x 86,143,505 = 86,143,505
and
-1 x -86,143,505 = 86,143,505
Notice both answers equal 86,143,505
With that explanation out of the way, let's continue. Next, we take the number 86,143,505 and divide it by 2:
86,143,505 ÷ 2 = 43,071,752.5
If the quotient is a whole number, then 2 and 43,071,752.5 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 | 86,143,505 | |
| -1 | -86,143,505 |
Now, we try dividing 86,143,505 by 3:
86,143,505 ÷ 3 = 28,714,501.6667
If the quotient is a whole number, then 3 and 28,714,501.6667 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 | 86,143,505 | |
| -1 | -86,143,505 |
Let's try dividing by 4:
86,143,505 ÷ 4 = 21,535,876.25
If the quotient is a whole number, then 4 and 21,535,876.25 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 | 86,143,505 | |
| -1 | 86,143,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 17 | 35 | 85 | 119 | 595 | 144,779 | 723,895 | 1,013,453 | 2,461,243 | 5,067,265 | 12,306,215 | 17,228,701 | 86,143,505 |
| -1 | -5 | -7 | -17 | -35 | -85 | -119 | -595 | -144,779 | -723,895 | -1,013,453 | -2,461,243 | -5,067,265 | -12,306,215 | -17,228,701 | -86,143,505 |
Here are some more numbers to try:
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