A:
Positive:
1 x 219939255 x 439878519 x 115757525 x 87975795 x 231515361 x 60925475 x 463031805 x 121852437 x 9025
Negative:
-1 x -21993925-5 x -4398785-19 x -1157575-25 x -879757-95 x -231515-361 x -60925-475 x -46303-1805 x -12185-2437 x -9025
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 21,993,925, 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 | 21,993,925 | |
| -1 | -21,993,925 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,993,925.
Example:
1 x 21,993,925 = 21,993,925
and
-1 x -21,993,925 = 21,993,925
Notice both answers equal 21,993,925
With that explanation out of the way, let's continue. Next, we take the number 21,993,925 and divide it by 2:
21,993,925 ÷ 2 = 10,996,962.5
If the quotient is a whole number, then 2 and 10,996,962.5 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 | 21,993,925 | |
| -1 | -21,993,925 |
Now, we try dividing 21,993,925 by 3:
21,993,925 ÷ 3 = 7,331,308.3333
If the quotient is a whole number, then 3 and 7,331,308.3333 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 | 21,993,925 | |
| -1 | -21,993,925 |
Let's try dividing by 4:
21,993,925 ÷ 4 = 5,498,481.25
If the quotient is a whole number, then 4 and 5,498,481.25 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 | 21,993,925 | |
| -1 | 21,993,925 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 95 | 361 | 475 | 1,805 | 2,437 | 9,025 | 12,185 | 46,303 | 60,925 | 231,515 | 879,757 | 1,157,575 | 4,398,785 | 21,993,925 |
| -1 | -5 | -19 | -25 | -95 | -361 | -475 | -1,805 | -2,437 | -9,025 | -12,185 | -46,303 | -60,925 | -231,515 | -879,757 | -1,157,575 | -4,398,785 | -21,993,925 |
Here are some more numbers to try:
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