A:
Positive:
1 x 31520721111 x 2865520173 x 4317907173 x 1822007803 x 3925371903 x 1656372269 x 13891912629 x 24959
Negative:
-1 x -315207211-11 x -28655201-73 x -4317907-173 x -1822007-803 x -392537-1903 x -165637-2269 x -138919-12629 x -24959
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 315,207,211, 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 | 315,207,211 | |
| -1 | -315,207,211 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 315,207,211.
Example:
1 x 315,207,211 = 315,207,211
and
-1 x -315,207,211 = 315,207,211
Notice both answers equal 315,207,211
With that explanation out of the way, let's continue. Next, we take the number 315,207,211 and divide it by 2:
315,207,211 ÷ 2 = 157,603,605.5
If the quotient is a whole number, then 2 and 157,603,605.5 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 | 315,207,211 | |
| -1 | -315,207,211 |
Now, we try dividing 315,207,211 by 3:
315,207,211 ÷ 3 = 105,069,070.3333
If the quotient is a whole number, then 3 and 105,069,070.3333 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 | 315,207,211 | |
| -1 | -315,207,211 |
Let's try dividing by 4:
315,207,211 ÷ 4 = 78,801,802.75
If the quotient is a whole number, then 4 and 78,801,802.75 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 | 315,207,211 | |
| -1 | 315,207,211 |
If you did it right, you will end up with this table:
| 1 | 11 | 73 | 173 | 803 | 1,903 | 2,269 | 12,629 | 24,959 | 138,919 | 165,637 | 392,537 | 1,822,007 | 4,317,907 | 28,655,201 | 315,207,211 |
| -1 | -11 | -73 | -173 | -803 | -1,903 | -2,269 | -12,629 | -24,959 | -138,919 | -165,637 | -392,537 | -1,822,007 | -4,317,907 | -28,655,201 | -315,207,211 |
Here are some more numbers to try:
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