A:
Positive:
1 x 866187917 x 1237411317 x 509522347 x 1842953119 x 727889289 x 299719329 x 263279799 x 108409911 x 950812023 x 428175593 x 154876377 x 13583
Negative:
-1 x -86618791-7 x -12374113-17 x -5095223-47 x -1842953-119 x -727889-289 x -299719-329 x -263279-799 x -108409-911 x -95081-2023 x -42817-5593 x -15487-6377 x -13583
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 86,618,791, 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 | 86,618,791 | |
| -1 | -86,618,791 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,618,791.
Example:
1 x 86,618,791 = 86,618,791
and
-1 x -86,618,791 = 86,618,791
Notice both answers equal 86,618,791
With that explanation out of the way, let's continue. Next, we take the number 86,618,791 and divide it by 2:
86,618,791 ÷ 2 = 43,309,395.5
If the quotient is a whole number, then 2 and 43,309,395.5 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 | 86,618,791 | |
| -1 | -86,618,791 |
Now, we try dividing 86,618,791 by 3:
86,618,791 ÷ 3 = 28,872,930.3333
If the quotient is a whole number, then 3 and 28,872,930.3333 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 | 86,618,791 | |
| -1 | -86,618,791 |
Let's try dividing by 4:
86,618,791 ÷ 4 = 21,654,697.75
If the quotient is a whole number, then 4 and 21,654,697.75 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 | 86,618,791 | |
| -1 | 86,618,791 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 47 | 119 | 289 | 329 | 799 | 911 | 2,023 | 5,593 | 6,377 | 13,583 | 15,487 | 42,817 | 95,081 | 108,409 | 263,279 | 299,719 | 727,889 | 1,842,953 | 5,095,223 | 12,374,113 | 86,618,791 |
| -1 | -7 | -17 | -47 | -119 | -289 | -329 | -799 | -911 | -2,023 | -5,593 | -6,377 | -13,583 | -15,487 | -42,817 | -95,081 | -108,409 | -263,279 | -299,719 | -727,889 | -1,842,953 | -5,095,223 | -12,374,113 | -86,618,791 |
Here are some more numbers to try:
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