A:
Positive:
1 x 41813877 x 59734119 x 220073133 x 31439149 x 28063211 x 198171043 x 40091477 x 2831
Negative:
-1 x -4181387-7 x -597341-19 x -220073-133 x -31439-149 x -28063-211 x -19817-1043 x -4009-1477 x -2831
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 4,181,387, 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 | 4,181,387 | |
| -1 | -4,181,387 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 4,181,387.
Example:
1 x 4,181,387 = 4,181,387
and
-1 x -4,181,387 = 4,181,387
Notice both answers equal 4,181,387
With that explanation out of the way, let's continue. Next, we take the number 4,181,387 and divide it by 2:
4,181,387 ÷ 2 = 2,090,693.5
If the quotient is a whole number, then 2 and 2,090,693.5 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 | 4,181,387 | |
| -1 | -4,181,387 |
Now, we try dividing 4,181,387 by 3:
4,181,387 ÷ 3 = 1,393,795.6667
If the quotient is a whole number, then 3 and 1,393,795.6667 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 | 4,181,387 | |
| -1 | -4,181,387 |
Let's try dividing by 4:
4,181,387 ÷ 4 = 1,045,346.75
If the quotient is a whole number, then 4 and 1,045,346.75 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 | 4,181,387 | |
| -1 | 4,181,387 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 133 | 149 | 211 | 1,043 | 1,477 | 2,831 | 4,009 | 19,817 | 28,063 | 31,439 | 220,073 | 597,341 | 4,181,387 |
| -1 | -7 | -19 | -133 | -149 | -211 | -1,043 | -1,477 | -2,831 | -4,009 | -19,817 | -28,063 | -31,439 | -220,073 | -597,341 | -4,181,387 |
Here are some more numbers to try:
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