A:
Positive:
1 x 2171612311 x 197419313 x 167047117 x 1277419143 x 151861187 x 116129221 x 982632431 x 8933
Negative:
-1 x -21716123-11 x -1974193-13 x -1670471-17 x -1277419-143 x -151861-187 x -116129-221 x -98263-2431 x -8933
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 21,716,123, 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 | 21,716,123 | |
| -1 | -21,716,123 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,716,123.
Example:
1 x 21,716,123 = 21,716,123
and
-1 x -21,716,123 = 21,716,123
Notice both answers equal 21,716,123
With that explanation out of the way, let's continue. Next, we take the number 21,716,123 and divide it by 2:
21,716,123 ÷ 2 = 10,858,061.5
If the quotient is a whole number, then 2 and 10,858,061.5 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 | 21,716,123 | |
| -1 | -21,716,123 |
Now, we try dividing 21,716,123 by 3:
21,716,123 ÷ 3 = 7,238,707.6667
If the quotient is a whole number, then 3 and 7,238,707.6667 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 | 21,716,123 | |
| -1 | -21,716,123 |
Let's try dividing by 4:
21,716,123 ÷ 4 = 5,429,030.75
If the quotient is a whole number, then 4 and 5,429,030.75 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 | 21,716,123 | |
| -1 | 21,716,123 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 17 | 143 | 187 | 221 | 2,431 | 8,933 | 98,263 | 116,129 | 151,861 | 1,277,419 | 1,670,471 | 1,974,193 | 21,716,123 |
| -1 | -11 | -13 | -17 | -143 | -187 | -221 | -2,431 | -8,933 | -98,263 | -116,129 | -151,861 | -1,277,419 | -1,670,471 | -1,974,193 | -21,716,123 |
Here are some more numbers to try:
Try the factor calculator