A:
Positive:
1 x 218993455 x 437986913 x 168456565 x 336913103 x 212615515 x 425231339 x 163553271 x 6695
Negative:
-1 x -21899345-5 x -4379869-13 x -1684565-65 x -336913-103 x -212615-515 x -42523-1339 x -16355-3271 x -6695
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 21,899,345, 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 | 21,899,345 | |
| -1 | -21,899,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,899,345.
Example:
1 x 21,899,345 = 21,899,345
and
-1 x -21,899,345 = 21,899,345
Notice both answers equal 21,899,345
With that explanation out of the way, let's continue. Next, we take the number 21,899,345 and divide it by 2:
21,899,345 ÷ 2 = 10,949,672.5
If the quotient is a whole number, then 2 and 10,949,672.5 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 | 21,899,345 | |
| -1 | -21,899,345 |
Now, we try dividing 21,899,345 by 3:
21,899,345 ÷ 3 = 7,299,781.6667
If the quotient is a whole number, then 3 and 7,299,781.6667 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 | 21,899,345 | |
| -1 | -21,899,345 |
Let's try dividing by 4:
21,899,345 ÷ 4 = 5,474,836.25
If the quotient is a whole number, then 4 and 5,474,836.25 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 | 21,899,345 | |
| -1 | 21,899,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 103 | 515 | 1,339 | 3,271 | 6,695 | 16,355 | 42,523 | 212,615 | 336,913 | 1,684,565 | 4,379,869 | 21,899,345 |
| -1 | -5 | -13 | -65 | -103 | -515 | -1,339 | -3,271 | -6,695 | -16,355 | -42,523 | -212,615 | -336,913 | -1,684,565 | -4,379,869 | -21,899,345 |
Here are some more numbers to try:
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