A:
Positive:
1 x 3127450155 x 6254900311 x 2843136555 x 5686273113 x 2767655565 x 5535311243 x 2516056215 x 50321
Negative:
-1 x -312745015-5 x -62549003-11 x -28431365-55 x -5686273-113 x -2767655-565 x -553531-1243 x -251605-6215 x -50321
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 312,745,015, 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 | 312,745,015 | |
| -1 | -312,745,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 312,745,015.
Example:
1 x 312,745,015 = 312,745,015
and
-1 x -312,745,015 = 312,745,015
Notice both answers equal 312,745,015
With that explanation out of the way, let's continue. Next, we take the number 312,745,015 and divide it by 2:
312,745,015 ÷ 2 = 156,372,507.5
If the quotient is a whole number, then 2 and 156,372,507.5 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 | 312,745,015 | |
| -1 | -312,745,015 |
Now, we try dividing 312,745,015 by 3:
312,745,015 ÷ 3 = 104,248,338.3333
If the quotient is a whole number, then 3 and 104,248,338.3333 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 | 312,745,015 | |
| -1 | -312,745,015 |
Let's try dividing by 4:
312,745,015 ÷ 4 = 78,186,253.75
If the quotient is a whole number, then 4 and 78,186,253.75 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 | 312,745,015 | |
| -1 | 312,745,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 113 | 565 | 1,243 | 6,215 | 50,321 | 251,605 | 553,531 | 2,767,655 | 5,686,273 | 28,431,365 | 62,549,003 | 312,745,015 |
| -1 | -5 | -11 | -55 | -113 | -565 | -1,243 | -6,215 | -50,321 | -251,605 | -553,531 | -2,767,655 | -5,686,273 | -28,431,365 | -62,549,003 | -312,745,015 |
Here are some more numbers to try:
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