A:
Positive:
1 x 3128782855 x 6257565717 x 1840460585 x 3680921173 x 1808545865 x 3617092941 x 10638514705 x 21277
Negative:
-1 x -312878285-5 x -62575657-17 x -18404605-85 x -3680921-173 x -1808545-865 x -361709-2941 x -106385-14705 x -21277
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 312,878,285, 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 | 312,878,285 | |
| -1 | -312,878,285 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 312,878,285.
Example:
1 x 312,878,285 = 312,878,285
and
-1 x -312,878,285 = 312,878,285
Notice both answers equal 312,878,285
With that explanation out of the way, let's continue. Next, we take the number 312,878,285 and divide it by 2:
312,878,285 ÷ 2 = 156,439,142.5
If the quotient is a whole number, then 2 and 156,439,142.5 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 | 312,878,285 | |
| -1 | -312,878,285 |
Now, we try dividing 312,878,285 by 3:
312,878,285 ÷ 3 = 104,292,761.6667
If the quotient is a whole number, then 3 and 104,292,761.6667 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 | 312,878,285 | |
| -1 | -312,878,285 |
Let's try dividing by 4:
312,878,285 ÷ 4 = 78,219,571.25
If the quotient is a whole number, then 4 and 78,219,571.25 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 | 312,878,285 | |
| -1 | 312,878,285 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 173 | 865 | 2,941 | 14,705 | 21,277 | 106,385 | 361,709 | 1,808,545 | 3,680,921 | 18,404,605 | 62,575,657 | 312,878,285 |
| -1 | -5 | -17 | -85 | -173 | -865 | -2,941 | -14,705 | -21,277 | -106,385 | -361,709 | -1,808,545 | -3,680,921 | -18,404,605 | -62,575,657 | -312,878,285 |
Here are some more numbers to try:
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