A:
Positive:
1 x 211164255 x 422328511 x 191967525 x 84465731 x 68117555 x 383935155 x 136235275 x 76787341 x 61925775 x 272471705 x 123852477 x 8525
Negative:
-1 x -21116425-5 x -4223285-11 x -1919675-25 x -844657-31 x -681175-55 x -383935-155 x -136235-275 x -76787-341 x -61925-775 x -27247-1705 x -12385-2477 x -8525
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 21,116,425, 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 | 21,116,425 | |
| -1 | -21,116,425 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,116,425.
Example:
1 x 21,116,425 = 21,116,425
and
-1 x -21,116,425 = 21,116,425
Notice both answers equal 21,116,425
With that explanation out of the way, let's continue. Next, we take the number 21,116,425 and divide it by 2:
21,116,425 ÷ 2 = 10,558,212.5
If the quotient is a whole number, then 2 and 10,558,212.5 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 | 21,116,425 | |
| -1 | -21,116,425 |
Now, we try dividing 21,116,425 by 3:
21,116,425 ÷ 3 = 7,038,808.3333
If the quotient is a whole number, then 3 and 7,038,808.3333 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 | 21,116,425 | |
| -1 | -21,116,425 |
Let's try dividing by 4:
21,116,425 ÷ 4 = 5,279,106.25
If the quotient is a whole number, then 4 and 5,279,106.25 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 | 21,116,425 | |
| -1 | 21,116,425 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 25 | 31 | 55 | 155 | 275 | 341 | 775 | 1,705 | 2,477 | 8,525 | 12,385 | 27,247 | 61,925 | 76,787 | 136,235 | 383,935 | 681,175 | 844,657 | 1,919,675 | 4,223,285 | 21,116,425 |
| -1 | -5 | -11 | -25 | -31 | -55 | -155 | -275 | -341 | -775 | -1,705 | -2,477 | -8,525 | -12,385 | -27,247 | -61,925 | -76,787 | -136,235 | -383,935 | -681,175 | -844,657 | -1,919,675 | -4,223,285 | -21,116,425 |
Here are some more numbers to try:
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