A:
Positive:
1 x 2156251117 x 126838319 x 1134869241 x 89471277 x 77843323 x 667574097 x 52634579 x 4709
Negative:
-1 x -21562511-17 x -1268383-19 x -1134869-241 x -89471-277 x -77843-323 x -66757-4097 x -5263-4579 x -4709
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 21,562,511, 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 | 21,562,511 | |
| -1 | -21,562,511 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,562,511.
Example:
1 x 21,562,511 = 21,562,511
and
-1 x -21,562,511 = 21,562,511
Notice both answers equal 21,562,511
With that explanation out of the way, let's continue. Next, we take the number 21,562,511 and divide it by 2:
21,562,511 ÷ 2 = 10,781,255.5
If the quotient is a whole number, then 2 and 10,781,255.5 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 | 21,562,511 | |
| -1 | -21,562,511 |
Now, we try dividing 21,562,511 by 3:
21,562,511 ÷ 3 = 7,187,503.6667
If the quotient is a whole number, then 3 and 7,187,503.6667 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 | 21,562,511 | |
| -1 | -21,562,511 |
Let's try dividing by 4:
21,562,511 ÷ 4 = 5,390,627.75
If the quotient is a whole number, then 4 and 5,390,627.75 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 | 21,562,511 | |
| -1 | 21,562,511 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 241 | 277 | 323 | 4,097 | 4,579 | 4,709 | 5,263 | 66,757 | 77,843 | 89,471 | 1,134,869 | 1,268,383 | 21,562,511 |
| -1 | -17 | -19 | -241 | -277 | -323 | -4,097 | -4,579 | -4,709 | -5,263 | -66,757 | -77,843 | -89,471 | -1,134,869 | -1,268,383 | -21,562,511 |
Here are some more numbers to try:
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