A:
Positive:
1 x 2851722855 x 5703445723 x 12398795115 x 24797591451 x 1965351709 x 1668657255 x 393078545 x 33373
Negative:
-1 x -285172285-5 x -57034457-23 x -12398795-115 x -2479759-1451 x -196535-1709 x -166865-7255 x -39307-8545 x -33373
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 285,172,285, 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 | 285,172,285 | |
| -1 | -285,172,285 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 285,172,285.
Example:
1 x 285,172,285 = 285,172,285
and
-1 x -285,172,285 = 285,172,285
Notice both answers equal 285,172,285
With that explanation out of the way, let's continue. Next, we take the number 285,172,285 and divide it by 2:
285,172,285 ÷ 2 = 142,586,142.5
If the quotient is a whole number, then 2 and 142,586,142.5 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 | 285,172,285 | |
| -1 | -285,172,285 |
Now, we try dividing 285,172,285 by 3:
285,172,285 ÷ 3 = 95,057,428.3333
If the quotient is a whole number, then 3 and 95,057,428.3333 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 | 285,172,285 | |
| -1 | -285,172,285 |
Let's try dividing by 4:
285,172,285 ÷ 4 = 71,293,071.25
If the quotient is a whole number, then 4 and 71,293,071.25 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 | 285,172,285 | |
| -1 | 285,172,285 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 1,451 | 1,709 | 7,255 | 8,545 | 33,373 | 39,307 | 166,865 | 196,535 | 2,479,759 | 12,398,795 | 57,034,457 | 285,172,285 |
| -1 | -5 | -23 | -115 | -1,451 | -1,709 | -7,255 | -8,545 | -33,373 | -39,307 | -166,865 | -196,535 | -2,479,759 | -12,398,795 | -57,034,457 | -285,172,285 |
Here are some more numbers to try:
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