A:
Positive:
1 x 211220037 x 301742971 x 297493497 x 42499
Negative:
-1 x -21122003-7 x -3017429-71 x -297493-497 x -42499
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 21,122,003, 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 | 21,122,003 | |
| -1 | -21,122,003 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,122,003.
Example:
1 x 21,122,003 = 21,122,003
and
-1 x -21,122,003 = 21,122,003
Notice both answers equal 21,122,003
With that explanation out of the way, let's continue. Next, we take the number 21,122,003 and divide it by 2:
21,122,003 ÷ 2 = 10,561,001.5
If the quotient is a whole number, then 2 and 10,561,001.5 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 | 21,122,003 | |
| -1 | -21,122,003 |
Now, we try dividing 21,122,003 by 3:
21,122,003 ÷ 3 = 7,040,667.6667
If the quotient is a whole number, then 3 and 7,040,667.6667 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 | 21,122,003 | |
| -1 | -21,122,003 |
Let's try dividing by 4:
21,122,003 ÷ 4 = 5,280,500.75
If the quotient is a whole number, then 4 and 5,280,500.75 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 | 21,122,003 | |
| -1 | 21,122,003 |
If you did it right, you will end up with this table:
| 1 | 7 | 71 | 497 | 42,499 | 297,493 | 3,017,429 | 21,122,003 |
| -1 | -7 | -71 | -497 | -42,499 | -297,493 | -3,017,429 | -21,122,003 |
Here are some more numbers to try:
Try the factor calculator