A:
Positive:
1 x 8221814913 x 632447319 x 4327271127 x 647387247 x 3328671651 x 497992413 x 340732621 x 31369
Negative:
-1 x -82218149-13 x -6324473-19 x -4327271-127 x -647387-247 x -332867-1651 x -49799-2413 x -34073-2621 x -31369
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 82,218,149, 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 | 82,218,149 | |
| -1 | -82,218,149 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 82,218,149.
Example:
1 x 82,218,149 = 82,218,149
and
-1 x -82,218,149 = 82,218,149
Notice both answers equal 82,218,149
With that explanation out of the way, let's continue. Next, we take the number 82,218,149 and divide it by 2:
82,218,149 ÷ 2 = 41,109,074.5
If the quotient is a whole number, then 2 and 41,109,074.5 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 | 82,218,149 | |
| -1 | -82,218,149 |
Now, we try dividing 82,218,149 by 3:
82,218,149 ÷ 3 = 27,406,049.6667
If the quotient is a whole number, then 3 and 27,406,049.6667 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 | 82,218,149 | |
| -1 | -82,218,149 |
Let's try dividing by 4:
82,218,149 ÷ 4 = 20,554,537.25
If the quotient is a whole number, then 4 and 20,554,537.25 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 | 82,218,149 | |
| -1 | 82,218,149 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 127 | 247 | 1,651 | 2,413 | 2,621 | 31,369 | 34,073 | 49,799 | 332,867 | 647,387 | 4,327,271 | 6,324,473 | 82,218,149 |
| -1 | -13 | -19 | -127 | -247 | -1,651 | -2,413 | -2,621 | -31,369 | -34,073 | -49,799 | -332,867 | -647,387 | -4,327,271 | -6,324,473 | -82,218,149 |
Here are some more numbers to try:
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