A:
Positive:
1 x 7859116111 x 714465123 x 3417007113 x 695497253 x 3106371243 x 632272599 x 302392749 x 28589
Negative:
-1 x -78591161-11 x -7144651-23 x -3417007-113 x -695497-253 x -310637-1243 x -63227-2599 x -30239-2749 x -28589
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 78,591,161, 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 | 78,591,161 | |
| -1 | -78,591,161 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,591,161.
Example:
1 x 78,591,161 = 78,591,161
and
-1 x -78,591,161 = 78,591,161
Notice both answers equal 78,591,161
With that explanation out of the way, let's continue. Next, we take the number 78,591,161 and divide it by 2:
78,591,161 ÷ 2 = 39,295,580.5
If the quotient is a whole number, then 2 and 39,295,580.5 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 | 78,591,161 | |
| -1 | -78,591,161 |
Now, we try dividing 78,591,161 by 3:
78,591,161 ÷ 3 = 26,197,053.6667
If the quotient is a whole number, then 3 and 26,197,053.6667 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 | 78,591,161 | |
| -1 | -78,591,161 |
Let's try dividing by 4:
78,591,161 ÷ 4 = 19,647,790.25
If the quotient is a whole number, then 4 and 19,647,790.25 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 | 78,591,161 | |
| -1 | 78,591,161 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 113 | 253 | 1,243 | 2,599 | 2,749 | 28,589 | 30,239 | 63,227 | 310,637 | 695,497 | 3,417,007 | 7,144,651 | 78,591,161 |
| -1 | -11 | -23 | -113 | -253 | -1,243 | -2,599 | -2,749 | -28,589 | -30,239 | -63,227 | -310,637 | -695,497 | -3,417,007 | -7,144,651 | -78,591,161 |
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