A:
Positive:
1 x 21321012713 x 1640077941 x 5200247337 x 632671533 x 4000191187 x 1796214381 x 4866713817 x 15431
Negative:
-1 x -213210127-13 x -16400779-41 x -5200247-337 x -632671-533 x -400019-1187 x -179621-4381 x -48667-13817 x -15431
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 213,210,127, 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 | 213,210,127 | |
| -1 | -213,210,127 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 213,210,127.
Example:
1 x 213,210,127 = 213,210,127
and
-1 x -213,210,127 = 213,210,127
Notice both answers equal 213,210,127
With that explanation out of the way, let's continue. Next, we take the number 213,210,127 and divide it by 2:
213,210,127 ÷ 2 = 106,605,063.5
If the quotient is a whole number, then 2 and 106,605,063.5 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 | 213,210,127 | |
| -1 | -213,210,127 |
Now, we try dividing 213,210,127 by 3:
213,210,127 ÷ 3 = 71,070,042.3333
If the quotient is a whole number, then 3 and 71,070,042.3333 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 | 213,210,127 | |
| -1 | -213,210,127 |
Let's try dividing by 4:
213,210,127 ÷ 4 = 53,302,531.75
If the quotient is a whole number, then 4 and 53,302,531.75 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 | 213,210,127 | |
| -1 | 213,210,127 |
If you did it right, you will end up with this table:
| 1 | 13 | 41 | 337 | 533 | 1,187 | 4,381 | 13,817 | 15,431 | 48,667 | 179,621 | 400,019 | 632,671 | 5,200,247 | 16,400,779 | 213,210,127 |
| -1 | -13 | -41 | -337 | -533 | -1,187 | -4,381 | -13,817 | -15,431 | -48,667 | -179,621 | -400,019 | -632,671 | -5,200,247 | -16,400,779 | -213,210,127 |
Here are some more numbers to try:
Try the factor calculator