A:
Positive:
1 x 81457216113 x 6265939719 x 42872219247 x 3297863547 x 14891636029 x 1351097111 x 11455110393 x 78377
Negative:
-1 x -814572161-13 x -62659397-19 x -42872219-247 x -3297863-547 x -1489163-6029 x -135109-7111 x -114551-10393 x -78377
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 814,572,161, 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 | 814,572,161 | |
| -1 | -814,572,161 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 814,572,161.
Example:
1 x 814,572,161 = 814,572,161
and
-1 x -814,572,161 = 814,572,161
Notice both answers equal 814,572,161
With that explanation out of the way, let's continue. Next, we take the number 814,572,161 and divide it by 2:
814,572,161 ÷ 2 = 407,286,080.5
If the quotient is a whole number, then 2 and 407,286,080.5 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 | 814,572,161 | |
| -1 | -814,572,161 |
Now, we try dividing 814,572,161 by 3:
814,572,161 ÷ 3 = 271,524,053.6667
If the quotient is a whole number, then 3 and 271,524,053.6667 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 | 814,572,161 | |
| -1 | -814,572,161 |
Let's try dividing by 4:
814,572,161 ÷ 4 = 203,643,040.25
If the quotient is a whole number, then 4 and 203,643,040.25 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 | 814,572,161 | |
| -1 | 814,572,161 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 247 | 547 | 6,029 | 7,111 | 10,393 | 78,377 | 114,551 | 135,109 | 1,489,163 | 3,297,863 | 42,872,219 | 62,659,397 | 814,572,161 |
| -1 | -13 | -19 | -247 | -547 | -6,029 | -7,111 | -10,393 | -78,377 | -114,551 | -135,109 | -1,489,163 | -3,297,863 | -42,872,219 | -62,659,397 | -814,572,161 |
Here are some more numbers to try:
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