A:
Positive:
1 x 1494479217 x 2134970337 x 403913347 x 3179743259 x 577019329 x 4542491739 x 8593912173 x 12277
Negative:
-1 x -149447921-7 x -21349703-37 x -4039133-47 x -3179743-259 x -577019-329 x -454249-1739 x -85939-12173 x -12277
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 149,447,921, 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 | 149,447,921 | |
| -1 | -149,447,921 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 149,447,921.
Example:
1 x 149,447,921 = 149,447,921
and
-1 x -149,447,921 = 149,447,921
Notice both answers equal 149,447,921
With that explanation out of the way, let's continue. Next, we take the number 149,447,921 and divide it by 2:
149,447,921 ÷ 2 = 74,723,960.5
If the quotient is a whole number, then 2 and 74,723,960.5 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 | 149,447,921 | |
| -1 | -149,447,921 |
Now, we try dividing 149,447,921 by 3:
149,447,921 ÷ 3 = 49,815,973.6667
If the quotient is a whole number, then 3 and 49,815,973.6667 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 | 149,447,921 | |
| -1 | -149,447,921 |
Let's try dividing by 4:
149,447,921 ÷ 4 = 37,361,980.25
If the quotient is a whole number, then 4 and 37,361,980.25 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 | 149,447,921 | |
| -1 | 149,447,921 |
If you did it right, you will end up with this table:
| 1 | 7 | 37 | 47 | 259 | 329 | 1,739 | 12,173 | 12,277 | 85,939 | 454,249 | 577,019 | 3,179,743 | 4,039,133 | 21,349,703 | 149,447,921 |
| -1 | -7 | -37 | -47 | -259 | -329 | -1,739 | -12,173 | -12,277 | -85,939 | -454,249 | -577,019 | -3,179,743 | -4,039,133 | -21,349,703 | -149,447,921 |
Here are some more numbers to try:
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