A:
Positive:
1 x 2113406911 x 192127929 x 72876197 x 217877319 x 66251683 x 309431067 x 198072813 x 7513
Negative:
-1 x -21134069-11 x -1921279-29 x -728761-97 x -217877-319 x -66251-683 x -30943-1067 x -19807-2813 x -7513
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 21,134,069, 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 | 21,134,069 | |
| -1 | -21,134,069 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,134,069.
Example:
1 x 21,134,069 = 21,134,069
and
-1 x -21,134,069 = 21,134,069
Notice both answers equal 21,134,069
With that explanation out of the way, let's continue. Next, we take the number 21,134,069 and divide it by 2:
21,134,069 ÷ 2 = 10,567,034.5
If the quotient is a whole number, then 2 and 10,567,034.5 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 | 21,134,069 | |
| -1 | -21,134,069 |
Now, we try dividing 21,134,069 by 3:
21,134,069 ÷ 3 = 7,044,689.6667
If the quotient is a whole number, then 3 and 7,044,689.6667 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 | 21,134,069 | |
| -1 | -21,134,069 |
Let's try dividing by 4:
21,134,069 ÷ 4 = 5,283,517.25
If the quotient is a whole number, then 4 and 5,283,517.25 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 | 21,134,069 | |
| -1 | 21,134,069 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 97 | 319 | 683 | 1,067 | 2,813 | 7,513 | 19,807 | 30,943 | 66,251 | 217,877 | 728,761 | 1,921,279 | 21,134,069 |
| -1 | -11 | -29 | -97 | -319 | -683 | -1,067 | -2,813 | -7,513 | -19,807 | -30,943 | -66,251 | -217,877 | -728,761 | -1,921,279 | -21,134,069 |
Here are some more numbers to try:
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