A:
Positive:
1 x 8126088655 x 162521773127 x 6398495563 x 1443355635 x 12796992273 x 3575052815 x 28867111365 x 71501
Negative:
-1 x -812608865-5 x -162521773-127 x -6398495-563 x -1443355-635 x -1279699-2273 x -357505-2815 x -288671-11365 x -71501
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 812,608,865, 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 | 812,608,865 | |
| -1 | -812,608,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 812,608,865.
Example:
1 x 812,608,865 = 812,608,865
and
-1 x -812,608,865 = 812,608,865
Notice both answers equal 812,608,865
With that explanation out of the way, let's continue. Next, we take the number 812,608,865 and divide it by 2:
812,608,865 ÷ 2 = 406,304,432.5
If the quotient is a whole number, then 2 and 406,304,432.5 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 | 812,608,865 | |
| -1 | -812,608,865 |
Now, we try dividing 812,608,865 by 3:
812,608,865 ÷ 3 = 270,869,621.6667
If the quotient is a whole number, then 3 and 270,869,621.6667 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 | 812,608,865 | |
| -1 | -812,608,865 |
Let's try dividing by 4:
812,608,865 ÷ 4 = 203,152,216.25
If the quotient is a whole number, then 4 and 203,152,216.25 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 | 812,608,865 | |
| -1 | 812,608,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 127 | 563 | 635 | 2,273 | 2,815 | 11,365 | 71,501 | 288,671 | 357,505 | 1,279,699 | 1,443,355 | 6,398,495 | 162,521,773 | 812,608,865 |
| -1 | -5 | -127 | -563 | -635 | -2,273 | -2,815 | -11,365 | -71,501 | -288,671 | -357,505 | -1,279,699 | -1,443,355 | -6,398,495 | -162,521,773 | -812,608,865 |
Here are some more numbers to try:
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