A:
Positive:
1 x 314151537 x 448787911 x 285592377 x 407989163 x 1927311141 x 275331793 x 175212503 x 12551
Negative:
-1 x -31415153-7 x -4487879-11 x -2855923-77 x -407989-163 x -192731-1141 x -27533-1793 x -17521-2503 x -12551
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 31,415,153, 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 | 31,415,153 | |
| -1 | -31,415,153 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,415,153.
Example:
1 x 31,415,153 = 31,415,153
and
-1 x -31,415,153 = 31,415,153
Notice both answers equal 31,415,153
With that explanation out of the way, let's continue. Next, we take the number 31,415,153 and divide it by 2:
31,415,153 ÷ 2 = 15,707,576.5
If the quotient is a whole number, then 2 and 15,707,576.5 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 | 31,415,153 | |
| -1 | -31,415,153 |
Now, we try dividing 31,415,153 by 3:
31,415,153 ÷ 3 = 10,471,717.6667
If the quotient is a whole number, then 3 and 10,471,717.6667 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 | 31,415,153 | |
| -1 | -31,415,153 |
Let's try dividing by 4:
31,415,153 ÷ 4 = 7,853,788.25
If the quotient is a whole number, then 4 and 7,853,788.25 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 | 31,415,153 | |
| -1 | 31,415,153 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 163 | 1,141 | 1,793 | 2,503 | 12,551 | 17,521 | 27,533 | 192,731 | 407,989 | 2,855,923 | 4,487,879 | 31,415,153 |
| -1 | -7 | -11 | -77 | -163 | -1,141 | -1,793 | -2,503 | -12,551 | -17,521 | -27,533 | -192,731 | -407,989 | -2,855,923 | -4,487,879 | -31,415,153 |
Here are some more numbers to try:
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