A:
Positive:
1 x 215876297 x 308394719 x 113619129 x 744401133 x 162313193 x 111853203 x 106343551 x 39179841 x 256691351 x 159793667 x 58873857 x 5597
Negative:
-1 x -21587629-7 x -3083947-19 x -1136191-29 x -744401-133 x -162313-193 x -111853-203 x -106343-551 x -39179-841 x -25669-1351 x -15979-3667 x -5887-3857 x -5597
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 21,587,629, 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 | 21,587,629 | |
| -1 | -21,587,629 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,587,629.
Example:
1 x 21,587,629 = 21,587,629
and
-1 x -21,587,629 = 21,587,629
Notice both answers equal 21,587,629
With that explanation out of the way, let's continue. Next, we take the number 21,587,629 and divide it by 2:
21,587,629 ÷ 2 = 10,793,814.5
If the quotient is a whole number, then 2 and 10,793,814.5 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 | 21,587,629 | |
| -1 | -21,587,629 |
Now, we try dividing 21,587,629 by 3:
21,587,629 ÷ 3 = 7,195,876.3333
If the quotient is a whole number, then 3 and 7,195,876.3333 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 | 21,587,629 | |
| -1 | -21,587,629 |
Let's try dividing by 4:
21,587,629 ÷ 4 = 5,396,907.25
If the quotient is a whole number, then 4 and 5,396,907.25 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 | 21,587,629 | |
| -1 | 21,587,629 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 29 | 133 | 193 | 203 | 551 | 841 | 1,351 | 3,667 | 3,857 | 5,597 | 5,887 | 15,979 | 25,669 | 39,179 | 106,343 | 111,853 | 162,313 | 744,401 | 1,136,191 | 3,083,947 | 21,587,629 |
| -1 | -7 | -19 | -29 | -133 | -193 | -203 | -551 | -841 | -1,351 | -3,667 | -3,857 | -5,597 | -5,887 | -15,979 | -25,669 | -39,179 | -106,343 | -111,853 | -162,313 | -744,401 | -1,136,191 | -3,083,947 | -21,587,629 |
Here are some more numbers to try:
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