A:
Positive:
1 x 153397797 x 219139713 x 117998391 x 168569101 x 151879707 x 216971313 x 116831669 x 9191
Negative:
-1 x -15339779-7 x -2191397-13 x -1179983-91 x -168569-101 x -151879-707 x -21697-1313 x -11683-1669 x -9191
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 15,339,779, 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 | 15,339,779 | |
| -1 | -15,339,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,339,779.
Example:
1 x 15,339,779 = 15,339,779
and
-1 x -15,339,779 = 15,339,779
Notice both answers equal 15,339,779
With that explanation out of the way, let's continue. Next, we take the number 15,339,779 and divide it by 2:
15,339,779 ÷ 2 = 7,669,889.5
If the quotient is a whole number, then 2 and 7,669,889.5 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 | 15,339,779 | |
| -1 | -15,339,779 |
Now, we try dividing 15,339,779 by 3:
15,339,779 ÷ 3 = 5,113,259.6667
If the quotient is a whole number, then 3 and 5,113,259.6667 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 | 15,339,779 | |
| -1 | -15,339,779 |
Let's try dividing by 4:
15,339,779 ÷ 4 = 3,834,944.75
If the quotient is a whole number, then 4 and 3,834,944.75 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 | 15,339,779 | |
| -1 | 15,339,779 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 101 | 707 | 1,313 | 1,669 | 9,191 | 11,683 | 21,697 | 151,879 | 168,569 | 1,179,983 | 2,191,397 | 15,339,779 |
| -1 | -7 | -13 | -91 | -101 | -707 | -1,313 | -1,669 | -9,191 | -11,683 | -21,697 | -151,879 | -168,569 | -1,179,983 | -2,191,397 | -15,339,779 |
Here are some more numbers to try:
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