A:
Positive:
1 x 217575197 x 310821749 x 444031229 x 95011277 x 78547343 x 634331603 x 135731939 x 11221
Negative:
-1 x -21757519-7 x -3108217-49 x -444031-229 x -95011-277 x -78547-343 x -63433-1603 x -13573-1939 x -11221
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 21,757,519, 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 | 21,757,519 | |
| -1 | -21,757,519 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,757,519.
Example:
1 x 21,757,519 = 21,757,519
and
-1 x -21,757,519 = 21,757,519
Notice both answers equal 21,757,519
With that explanation out of the way, let's continue. Next, we take the number 21,757,519 and divide it by 2:
21,757,519 ÷ 2 = 10,878,759.5
If the quotient is a whole number, then 2 and 10,878,759.5 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 | 21,757,519 | |
| -1 | -21,757,519 |
Now, we try dividing 21,757,519 by 3:
21,757,519 ÷ 3 = 7,252,506.3333
If the quotient is a whole number, then 3 and 7,252,506.3333 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 | 21,757,519 | |
| -1 | -21,757,519 |
Let's try dividing by 4:
21,757,519 ÷ 4 = 5,439,379.75
If the quotient is a whole number, then 4 and 5,439,379.75 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 | 21,757,519 | |
| -1 | 21,757,519 |
If you did it right, you will end up with this table:
| 1 | 7 | 49 | 229 | 277 | 343 | 1,603 | 1,939 | 11,221 | 13,573 | 63,433 | 78,547 | 95,011 | 444,031 | 3,108,217 | 21,757,519 |
| -1 | -7 | -49 | -229 | -277 | -343 | -1,603 | -1,939 | -11,221 | -13,573 | -63,433 | -78,547 | -95,011 | -444,031 | -3,108,217 | -21,757,519 |
Here are some more numbers to try:
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