A:
Positive:
1 x 28994761913 x 2230366319 x 1526040131 x 9353149247 x 1173877361 x 803179403 x 719473589 x 4922711993 x 1454834693 x 617837657 x 3786711191 x 25909
Negative:
-1 x -289947619-13 x -22303663-19 x -15260401-31 x -9353149-247 x -1173877-361 x -803179-403 x -719473-589 x -492271-1993 x -145483-4693 x -61783-7657 x -37867-11191 x -25909
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 289,947,619, 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 | 289,947,619 | |
| -1 | -289,947,619 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 289,947,619.
Example:
1 x 289,947,619 = 289,947,619
and
-1 x -289,947,619 = 289,947,619
Notice both answers equal 289,947,619
With that explanation out of the way, let's continue. Next, we take the number 289,947,619 and divide it by 2:
289,947,619 ÷ 2 = 144,973,809.5
If the quotient is a whole number, then 2 and 144,973,809.5 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 | 289,947,619 | |
| -1 | -289,947,619 |
Now, we try dividing 289,947,619 by 3:
289,947,619 ÷ 3 = 96,649,206.3333
If the quotient is a whole number, then 3 and 96,649,206.3333 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 | 289,947,619 | |
| -1 | -289,947,619 |
Let's try dividing by 4:
289,947,619 ÷ 4 = 72,486,904.75
If the quotient is a whole number, then 4 and 72,486,904.75 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 | 289,947,619 | |
| -1 | 289,947,619 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 31 | 247 | 361 | 403 | 589 | 1,993 | 4,693 | 7,657 | 11,191 | 25,909 | 37,867 | 61,783 | 145,483 | 492,271 | 719,473 | 803,179 | 1,173,877 | 9,353,149 | 15,260,401 | 22,303,663 | 289,947,619 |
| -1 | -13 | -19 | -31 | -247 | -361 | -403 | -589 | -1,993 | -4,693 | -7,657 | -11,191 | -25,909 | -37,867 | -61,783 | -145,483 | -492,271 | -719,473 | -803,179 | -1,173,877 | -9,353,149 | -15,260,401 | -22,303,663 | -289,947,619 |
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