A:
Positive:
1 x 156446155 x 31289237 x 223494531 x 50466535 x 446989155 x 100933217 x 720951085 x 14419
Negative:
-1 x -15644615-5 x -3128923-7 x -2234945-31 x -504665-35 x -446989-155 x -100933-217 x -72095-1085 x -14419
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 15,644,615, 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 | 15,644,615 | |
| -1 | -15,644,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,644,615.
Example:
1 x 15,644,615 = 15,644,615
and
-1 x -15,644,615 = 15,644,615
Notice both answers equal 15,644,615
With that explanation out of the way, let's continue. Next, we take the number 15,644,615 and divide it by 2:
15,644,615 ÷ 2 = 7,822,307.5
If the quotient is a whole number, then 2 and 7,822,307.5 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 | 15,644,615 | |
| -1 | -15,644,615 |
Now, we try dividing 15,644,615 by 3:
15,644,615 ÷ 3 = 5,214,871.6667
If the quotient is a whole number, then 3 and 5,214,871.6667 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 | 15,644,615 | |
| -1 | -15,644,615 |
Let's try dividing by 4:
15,644,615 ÷ 4 = 3,911,153.75
If the quotient is a whole number, then 4 and 3,911,153.75 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 | 15,644,615 | |
| -1 | 15,644,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 31 | 35 | 155 | 217 | 1,085 | 14,419 | 72,095 | 100,933 | 446,989 | 504,665 | 2,234,945 | 3,128,923 | 15,644,615 |
| -1 | -5 | -7 | -31 | -35 | -155 | -217 | -1,085 | -14,419 | -72,095 | -100,933 | -446,989 | -504,665 | -2,234,945 | -3,128,923 | -15,644,615 |
Here are some more numbers to try:
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