A:
Positive:
1 x 206746197 x 295351741 x 50425949 x 421931251 x 82369287 x 720371681 x 122991757 x 117672009 x 10291
Negative:
-1 x -20674619-7 x -2953517-41 x -504259-49 x -421931-251 x -82369-287 x -72037-1681 x -12299-1757 x -11767-2009 x -10291
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 20,674,619, 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 | 20,674,619 | |
| -1 | -20,674,619 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,674,619.
Example:
1 x 20,674,619 = 20,674,619
and
-1 x -20,674,619 = 20,674,619
Notice both answers equal 20,674,619
With that explanation out of the way, let's continue. Next, we take the number 20,674,619 and divide it by 2:
20,674,619 ÷ 2 = 10,337,309.5
If the quotient is a whole number, then 2 and 10,337,309.5 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 | 20,674,619 | |
| -1 | -20,674,619 |
Now, we try dividing 20,674,619 by 3:
20,674,619 ÷ 3 = 6,891,539.6667
If the quotient is a whole number, then 3 and 6,891,539.6667 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 | 20,674,619 | |
| -1 | -20,674,619 |
Let's try dividing by 4:
20,674,619 ÷ 4 = 5,168,654.75
If the quotient is a whole number, then 4 and 5,168,654.75 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 | 20,674,619 | |
| -1 | 20,674,619 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 49 | 251 | 287 | 1,681 | 1,757 | 2,009 | 10,291 | 11,767 | 12,299 | 72,037 | 82,369 | 421,931 | 504,259 | 2,953,517 | 20,674,619 |
| -1 | -7 | -41 | -49 | -251 | -287 | -1,681 | -1,757 | -2,009 | -10,291 | -11,767 | -12,299 | -72,037 | -82,369 | -421,931 | -504,259 | -2,953,517 | -20,674,619 |
Here are some more numbers to try:
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