A:
Positive:
1 x 3112430155 x 6224860323 x 1353230579 x 3939785115 x 2706461395 x 7879571817 x 1712959085 x 34259
Negative:
-1 x -311243015-5 x -62248603-23 x -13532305-79 x -3939785-115 x -2706461-395 x -787957-1817 x -171295-9085 x -34259
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 311,243,015, 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 | 311,243,015 | |
| -1 | -311,243,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 311,243,015.
Example:
1 x 311,243,015 = 311,243,015
and
-1 x -311,243,015 = 311,243,015
Notice both answers equal 311,243,015
With that explanation out of the way, let's continue. Next, we take the number 311,243,015 and divide it by 2:
311,243,015 ÷ 2 = 155,621,507.5
If the quotient is a whole number, then 2 and 155,621,507.5 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 | 311,243,015 | |
| -1 | -311,243,015 |
Now, we try dividing 311,243,015 by 3:
311,243,015 ÷ 3 = 103,747,671.6667
If the quotient is a whole number, then 3 and 103,747,671.6667 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 | 311,243,015 | |
| -1 | -311,243,015 |
Let's try dividing by 4:
311,243,015 ÷ 4 = 77,810,753.75
If the quotient is a whole number, then 4 and 77,810,753.75 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 | 311,243,015 | |
| -1 | 311,243,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 79 | 115 | 395 | 1,817 | 9,085 | 34,259 | 171,295 | 787,957 | 2,706,461 | 3,939,785 | 13,532,305 | 62,248,603 | 311,243,015 |
| -1 | -5 | -23 | -79 | -115 | -395 | -1,817 | -9,085 | -34,259 | -171,295 | -787,957 | -2,706,461 | -3,939,785 | -13,532,305 | -62,248,603 | -311,243,015 |
Here are some more numbers to try:
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