A:
Positive:
1 x 153716155 x 30743237 x 219594535 x 439189431 x 356651019 x 150852155 x 71333017 x 5095
Negative:
-1 x -15371615-5 x -3074323-7 x -2195945-35 x -439189-431 x -35665-1019 x -15085-2155 x -7133-3017 x -5095
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 15,371,615, 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 | 15,371,615 | |
| -1 | -15,371,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,371,615.
Example:
1 x 15,371,615 = 15,371,615
and
-1 x -15,371,615 = 15,371,615
Notice both answers equal 15,371,615
With that explanation out of the way, let's continue. Next, we take the number 15,371,615 and divide it by 2:
15,371,615 ÷ 2 = 7,685,807.5
If the quotient is a whole number, then 2 and 7,685,807.5 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 | 15,371,615 | |
| -1 | -15,371,615 |
Now, we try dividing 15,371,615 by 3:
15,371,615 ÷ 3 = 5,123,871.6667
If the quotient is a whole number, then 3 and 5,123,871.6667 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 | 15,371,615 | |
| -1 | -15,371,615 |
Let's try dividing by 4:
15,371,615 ÷ 4 = 3,842,903.75
If the quotient is a whole number, then 4 and 3,842,903.75 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 | 15,371,615 | |
| -1 | 15,371,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 431 | 1,019 | 2,155 | 3,017 | 5,095 | 7,133 | 15,085 | 35,665 | 439,189 | 2,195,945 | 3,074,323 | 15,371,615 |
| -1 | -5 | -7 | -35 | -431 | -1,019 | -2,155 | -3,017 | -5,095 | -7,133 | -15,085 | -35,665 | -439,189 | -2,195,945 | -3,074,323 | -15,371,615 |
Here are some more numbers to try:
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