A:
Positive:
1 x 153815355 x 307630713 x 118319565 x 236639109 x 141115167 x 92105169 x 91015545 x 28223835 x 18421845 x 182031417 x 108552171 x 7085
Negative:
-1 x -15381535-5 x -3076307-13 x -1183195-65 x -236639-109 x -141115-167 x -92105-169 x -91015-545 x -28223-835 x -18421-845 x -18203-1417 x -10855-2171 x -7085
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 15,381,535, 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 | 15,381,535 | |
| -1 | -15,381,535 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,381,535.
Example:
1 x 15,381,535 = 15,381,535
and
-1 x -15,381,535 = 15,381,535
Notice both answers equal 15,381,535
With that explanation out of the way, let's continue. Next, we take the number 15,381,535 and divide it by 2:
15,381,535 ÷ 2 = 7,690,767.5
If the quotient is a whole number, then 2 and 7,690,767.5 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 | 15,381,535 | |
| -1 | -15,381,535 |
Now, we try dividing 15,381,535 by 3:
15,381,535 ÷ 3 = 5,127,178.3333
If the quotient is a whole number, then 3 and 5,127,178.3333 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 | 15,381,535 | |
| -1 | -15,381,535 |
Let's try dividing by 4:
15,381,535 ÷ 4 = 3,845,383.75
If the quotient is a whole number, then 4 and 3,845,383.75 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 | 15,381,535 | |
| -1 | 15,381,535 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 109 | 167 | 169 | 545 | 835 | 845 | 1,417 | 2,171 | 7,085 | 10,855 | 18,203 | 18,421 | 28,223 | 91,015 | 92,105 | 141,115 | 236,639 | 1,183,195 | 3,076,307 | 15,381,535 |
| -1 | -5 | -13 | -65 | -109 | -167 | -169 | -545 | -835 | -845 | -1,417 | -2,171 | -7,085 | -10,855 | -18,203 | -18,421 | -28,223 | -91,015 | -92,105 | -141,115 | -236,639 | -1,183,195 | -3,076,307 | -15,381,535 |
Here are some more numbers to try:
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