A:
Positive:
1 x 6681736113 x 513979717 x 3930433169 x 395369221 x 3023411789 x 373492197 x 304132873 x 23257
Negative:
-1 x -66817361-13 x -5139797-17 x -3930433-169 x -395369-221 x -302341-1789 x -37349-2197 x -30413-2873 x -23257
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 66,817,361, 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 | 66,817,361 | |
| -1 | -66,817,361 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 66,817,361.
Example:
1 x 66,817,361 = 66,817,361
and
-1 x -66,817,361 = 66,817,361
Notice both answers equal 66,817,361
With that explanation out of the way, let's continue. Next, we take the number 66,817,361 and divide it by 2:
66,817,361 ÷ 2 = 33,408,680.5
If the quotient is a whole number, then 2 and 33,408,680.5 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 | 66,817,361 | |
| -1 | -66,817,361 |
Now, we try dividing 66,817,361 by 3:
66,817,361 ÷ 3 = 22,272,453.6667
If the quotient is a whole number, then 3 and 22,272,453.6667 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 | 66,817,361 | |
| -1 | -66,817,361 |
Let's try dividing by 4:
66,817,361 ÷ 4 = 16,704,340.25
If the quotient is a whole number, then 4 and 16,704,340.25 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 | 66,817,361 | |
| -1 | 66,817,361 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 169 | 221 | 1,789 | 2,197 | 2,873 | 23,257 | 30,413 | 37,349 | 302,341 | 395,369 | 3,930,433 | 5,139,797 | 66,817,361 |
| -1 | -13 | -17 | -169 | -221 | -1,789 | -2,197 | -2,873 | -23,257 | -30,413 | -37,349 | -302,341 | -395,369 | -3,930,433 | -5,139,797 | -66,817,361 |
Here are some more numbers to try:
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