A:
Positive:
1 x 1549783723 x 67381967 x 23131189 x 174133113 x 1371491541 x 100572047 x 75712599 x 5963
Negative:
-1 x -15497837-23 x -673819-67 x -231311-89 x -174133-113 x -137149-1541 x -10057-2047 x -7571-2599 x -5963
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 15,497,837, 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 | 15,497,837 | |
| -1 | -15,497,837 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,497,837.
Example:
1 x 15,497,837 = 15,497,837
and
-1 x -15,497,837 = 15,497,837
Notice both answers equal 15,497,837
With that explanation out of the way, let's continue. Next, we take the number 15,497,837 and divide it by 2:
15,497,837 ÷ 2 = 7,748,918.5
If the quotient is a whole number, then 2 and 7,748,918.5 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 | 15,497,837 | |
| -1 | -15,497,837 |
Now, we try dividing 15,497,837 by 3:
15,497,837 ÷ 3 = 5,165,945.6667
If the quotient is a whole number, then 3 and 5,165,945.6667 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 | 15,497,837 | |
| -1 | -15,497,837 |
Let's try dividing by 4:
15,497,837 ÷ 4 = 3,874,459.25
If the quotient is a whole number, then 4 and 3,874,459.25 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 | 15,497,837 | |
| -1 | 15,497,837 |
If you did it right, you will end up with this table:
| 1 | 23 | 67 | 89 | 113 | 1,541 | 2,047 | 2,599 | 5,963 | 7,571 | 10,057 | 137,149 | 174,133 | 231,311 | 673,819 | 15,497,837 |
| -1 | -23 | -67 | -89 | -113 | -1,541 | -2,047 | -2,599 | -5,963 | -7,571 | -10,057 | -137,149 | -174,133 | -231,311 | -673,819 | -15,497,837 |
Here are some more numbers to try:
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