A:
Positive:
1 x 154311437 x 220444913 x 118701191 x 169573151 x 1021931057 x 145991123 x 137411963 x 7861
Negative:
-1 x -15431143-7 x -2204449-13 x -1187011-91 x -169573-151 x -102193-1057 x -14599-1123 x -13741-1963 x -7861
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 15,431,143, 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 | 15,431,143 | |
| -1 | -15,431,143 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,431,143.
Example:
1 x 15,431,143 = 15,431,143
and
-1 x -15,431,143 = 15,431,143
Notice both answers equal 15,431,143
With that explanation out of the way, let's continue. Next, we take the number 15,431,143 and divide it by 2:
15,431,143 ÷ 2 = 7,715,571.5
If the quotient is a whole number, then 2 and 7,715,571.5 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 | 15,431,143 | |
| -1 | -15,431,143 |
Now, we try dividing 15,431,143 by 3:
15,431,143 ÷ 3 = 5,143,714.3333
If the quotient is a whole number, then 3 and 5,143,714.3333 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 | 15,431,143 | |
| -1 | -15,431,143 |
Let's try dividing by 4:
15,431,143 ÷ 4 = 3,857,785.75
If the quotient is a whole number, then 4 and 3,857,785.75 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 | 15,431,143 | |
| -1 | 15,431,143 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 151 | 1,057 | 1,123 | 1,963 | 7,861 | 13,741 | 14,599 | 102,193 | 169,573 | 1,187,011 | 2,204,449 | 15,431,143 |
| -1 | -7 | -13 | -91 | -151 | -1,057 | -1,123 | -1,963 | -7,861 | -13,741 | -14,599 | -102,193 | -169,573 | -1,187,011 | -2,204,449 | -15,431,143 |
Here are some more numbers to try:
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