A:
Positive:
1 x 1572403117 x 92494359 x 26650961 x 257771257 x 611831003 x 156771037 x 151633599 x 4369
Negative:
-1 x -15724031-17 x -924943-59 x -266509-61 x -257771-257 x -61183-1003 x -15677-1037 x -15163-3599 x -4369
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 15,724,031, 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 | 15,724,031 | |
| -1 | -15,724,031 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,724,031.
Example:
1 x 15,724,031 = 15,724,031
and
-1 x -15,724,031 = 15,724,031
Notice both answers equal 15,724,031
With that explanation out of the way, let's continue. Next, we take the number 15,724,031 and divide it by 2:
15,724,031 ÷ 2 = 7,862,015.5
If the quotient is a whole number, then 2 and 7,862,015.5 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 | 15,724,031 | |
| -1 | -15,724,031 |
Now, we try dividing 15,724,031 by 3:
15,724,031 ÷ 3 = 5,241,343.6667
If the quotient is a whole number, then 3 and 5,241,343.6667 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 | 15,724,031 | |
| -1 | -15,724,031 |
Let's try dividing by 4:
15,724,031 ÷ 4 = 3,931,007.75
If the quotient is a whole number, then 4 and 3,931,007.75 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 | 15,724,031 | |
| -1 | 15,724,031 |
If you did it right, you will end up with this table:
| 1 | 17 | 59 | 61 | 257 | 1,003 | 1,037 | 3,599 | 4,369 | 15,163 | 15,677 | 61,183 | 257,771 | 266,509 | 924,943 | 15,724,031 |
| -1 | -17 | -59 | -61 | -257 | -1,003 | -1,037 | -3,599 | -4,369 | -15,163 | -15,677 | -61,183 | -257,771 | -266,509 | -924,943 | -15,724,031 |
Here are some more numbers to try:
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