A:
Positive:
1 x 2186817113 x 168216717 x 128636353 x 412607221 x 98951689 x 31739901 x 242711867 x 11713
Negative:
-1 x -21868171-13 x -1682167-17 x -1286363-53 x -412607-221 x -98951-689 x -31739-901 x -24271-1867 x -11713
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 21,868,171, 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 | 21,868,171 | |
| -1 | -21,868,171 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,868,171.
Example:
1 x 21,868,171 = 21,868,171
and
-1 x -21,868,171 = 21,868,171
Notice both answers equal 21,868,171
With that explanation out of the way, let's continue. Next, we take the number 21,868,171 and divide it by 2:
21,868,171 ÷ 2 = 10,934,085.5
If the quotient is a whole number, then 2 and 10,934,085.5 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 | 21,868,171 | |
| -1 | -21,868,171 |
Now, we try dividing 21,868,171 by 3:
21,868,171 ÷ 3 = 7,289,390.3333
If the quotient is a whole number, then 3 and 7,289,390.3333 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 | 21,868,171 | |
| -1 | -21,868,171 |
Let's try dividing by 4:
21,868,171 ÷ 4 = 5,467,042.75
If the quotient is a whole number, then 4 and 5,467,042.75 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 | 21,868,171 | |
| -1 | 21,868,171 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 53 | 221 | 689 | 901 | 1,867 | 11,713 | 24,271 | 31,739 | 98,951 | 412,607 | 1,286,363 | 1,682,167 | 21,868,171 |
| -1 | -13 | -17 | -53 | -221 | -689 | -901 | -1,867 | -11,713 | -24,271 | -31,739 | -98,951 | -412,607 | -1,286,363 | -1,682,167 | -21,868,171 |
Here are some more numbers to try:
Try the factor calculator