A:
Positive:
1 x 215467255 x 430934525 x 86186961 x 35322571 x 303475199 x 108275305 x 70645355 x 60695995 x 216551525 x 141291775 x 121394331 x 4975
Negative:
-1 x -21546725-5 x -4309345-25 x -861869-61 x -353225-71 x -303475-199 x -108275-305 x -70645-355 x -60695-995 x -21655-1525 x -14129-1775 x -12139-4331 x -4975
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 21,546,725, 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 | 21,546,725 | |
| -1 | -21,546,725 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,546,725.
Example:
1 x 21,546,725 = 21,546,725
and
-1 x -21,546,725 = 21,546,725
Notice both answers equal 21,546,725
With that explanation out of the way, let's continue. Next, we take the number 21,546,725 and divide it by 2:
21,546,725 ÷ 2 = 10,773,362.5
If the quotient is a whole number, then 2 and 10,773,362.5 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 | 21,546,725 | |
| -1 | -21,546,725 |
Now, we try dividing 21,546,725 by 3:
21,546,725 ÷ 3 = 7,182,241.6667
If the quotient is a whole number, then 3 and 7,182,241.6667 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 | 21,546,725 | |
| -1 | -21,546,725 |
Let's try dividing by 4:
21,546,725 ÷ 4 = 5,386,681.25
If the quotient is a whole number, then 4 and 5,386,681.25 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 | 21,546,725 | |
| -1 | 21,546,725 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 61 | 71 | 199 | 305 | 355 | 995 | 1,525 | 1,775 | 4,331 | 4,975 | 12,139 | 14,129 | 21,655 | 60,695 | 70,645 | 108,275 | 303,475 | 353,225 | 861,869 | 4,309,345 | 21,546,725 |
| -1 | -5 | -25 | -61 | -71 | -199 | -305 | -355 | -995 | -1,525 | -1,775 | -4,331 | -4,975 | -12,139 | -14,129 | -21,655 | -60,695 | -70,645 | -108,275 | -303,475 | -353,225 | -861,869 | -4,309,345 | -21,546,725 |
Here are some more numbers to try:
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