A:
Positive:
1 x 641652055 x 1283304113 x 493578541 x 156500565 x 987157205 x 313001533 x 1203852665 x 24077
Negative:
-1 x -64165205-5 x -12833041-13 x -4935785-41 x -1565005-65 x -987157-205 x -313001-533 x -120385-2665 x -24077
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 64,165,205, 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 | 64,165,205 | |
| -1 | -64,165,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,165,205.
Example:
1 x 64,165,205 = 64,165,205
and
-1 x -64,165,205 = 64,165,205
Notice both answers equal 64,165,205
With that explanation out of the way, let's continue. Next, we take the number 64,165,205 and divide it by 2:
64,165,205 ÷ 2 = 32,082,602.5
If the quotient is a whole number, then 2 and 32,082,602.5 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 | 64,165,205 | |
| -1 | -64,165,205 |
Now, we try dividing 64,165,205 by 3:
64,165,205 ÷ 3 = 21,388,401.6667
If the quotient is a whole number, then 3 and 21,388,401.6667 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 | 64,165,205 | |
| -1 | -64,165,205 |
Let's try dividing by 4:
64,165,205 ÷ 4 = 16,041,301.25
If the quotient is a whole number, then 4 and 16,041,301.25 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 | 64,165,205 | |
| -1 | 64,165,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 41 | 65 | 205 | 533 | 2,665 | 24,077 | 120,385 | 313,001 | 987,157 | 1,565,005 | 4,935,785 | 12,833,041 | 64,165,205 |
| -1 | -5 | -13 | -41 | -65 | -205 | -533 | -2,665 | -24,077 | -120,385 | -313,001 | -987,157 | -1,565,005 | -4,935,785 | -12,833,041 | -64,165,205 |
Here are some more numbers to try:
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