A:
Positive:
1 x 2135034255 x 4270068517 x 1255902525 x 854013779 x 270257585 x 2511805395 x 540515425 x 5023611343 x 1589751975 x 1081036359 x 335756715 x 31795
Negative:
-1 x -213503425-5 x -42700685-17 x -12559025-25 x -8540137-79 x -2702575-85 x -2511805-395 x -540515-425 x -502361-1343 x -158975-1975 x -108103-6359 x -33575-6715 x -31795
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 213,503,425, 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 | 213,503,425 | |
| -1 | -213,503,425 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 213,503,425.
Example:
1 x 213,503,425 = 213,503,425
and
-1 x -213,503,425 = 213,503,425
Notice both answers equal 213,503,425
With that explanation out of the way, let's continue. Next, we take the number 213,503,425 and divide it by 2:
213,503,425 ÷ 2 = 106,751,712.5
If the quotient is a whole number, then 2 and 106,751,712.5 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 | 213,503,425 | |
| -1 | -213,503,425 |
Now, we try dividing 213,503,425 by 3:
213,503,425 ÷ 3 = 71,167,808.3333
If the quotient is a whole number, then 3 and 71,167,808.3333 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 | 213,503,425 | |
| -1 | -213,503,425 |
Let's try dividing by 4:
213,503,425 ÷ 4 = 53,375,856.25
If the quotient is a whole number, then 4 and 53,375,856.25 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 | 213,503,425 | |
| -1 | 213,503,425 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 25 | 79 | 85 | 395 | 425 | 1,343 | 1,975 | 6,359 | 6,715 | 31,795 | 33,575 | 108,103 | 158,975 | 502,361 | 540,515 | 2,511,805 | 2,702,575 | 8,540,137 | 12,559,025 | 42,700,685 | 213,503,425 |
| -1 | -5 | -17 | -25 | -79 | -85 | -395 | -425 | -1,343 | -1,975 | -6,359 | -6,715 | -31,795 | -33,575 | -108,103 | -158,975 | -502,361 | -540,515 | -2,511,805 | -2,702,575 | -8,540,137 | -12,559,025 | -42,700,685 | -213,503,425 |
Here are some more numbers to try:
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