A:
Positive:
1 x 215376355 x 43075277 x 307680535 x 615361173 x 124495865 x 248991211 x 177853557 x 6055
Negative:
-1 x -21537635-5 x -4307527-7 x -3076805-35 x -615361-173 x -124495-865 x -24899-1211 x -17785-3557 x -6055
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 21,537,635, 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 | 21,537,635 | |
| -1 | -21,537,635 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,537,635.
Example:
1 x 21,537,635 = 21,537,635
and
-1 x -21,537,635 = 21,537,635
Notice both answers equal 21,537,635
With that explanation out of the way, let's continue. Next, we take the number 21,537,635 and divide it by 2:
21,537,635 ÷ 2 = 10,768,817.5
If the quotient is a whole number, then 2 and 10,768,817.5 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 | 21,537,635 | |
| -1 | -21,537,635 |
Now, we try dividing 21,537,635 by 3:
21,537,635 ÷ 3 = 7,179,211.6667
If the quotient is a whole number, then 3 and 7,179,211.6667 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 | 21,537,635 | |
| -1 | -21,537,635 |
Let's try dividing by 4:
21,537,635 ÷ 4 = 5,384,408.75
If the quotient is a whole number, then 4 and 5,384,408.75 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 | 21,537,635 | |
| -1 | 21,537,635 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 173 | 865 | 1,211 | 3,557 | 6,055 | 17,785 | 24,899 | 124,495 | 615,361 | 3,076,805 | 4,307,527 | 21,537,635 |
| -1 | -5 | -7 | -35 | -173 | -865 | -1,211 | -3,557 | -6,055 | -17,785 | -24,899 | -124,495 | -615,361 | -3,076,805 | -4,307,527 | -21,537,635 |
Here are some more numbers to try:
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