A:
Positive:
1 x 648616437 x 926594911 x 589651349 x 132370777 x 842359343 x 189101539 x 1203373773 x 17191
Negative:
-1 x -64861643-7 x -9265949-11 x -5896513-49 x -1323707-77 x -842359-343 x -189101-539 x -120337-3773 x -17191
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 64,861,643, 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 | 64,861,643 | |
| -1 | -64,861,643 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,861,643.
Example:
1 x 64,861,643 = 64,861,643
and
-1 x -64,861,643 = 64,861,643
Notice both answers equal 64,861,643
With that explanation out of the way, let's continue. Next, we take the number 64,861,643 and divide it by 2:
64,861,643 ÷ 2 = 32,430,821.5
If the quotient is a whole number, then 2 and 32,430,821.5 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 | 64,861,643 | |
| -1 | -64,861,643 |
Now, we try dividing 64,861,643 by 3:
64,861,643 ÷ 3 = 21,620,547.6667
If the quotient is a whole number, then 3 and 21,620,547.6667 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 | 64,861,643 | |
| -1 | -64,861,643 |
Let's try dividing by 4:
64,861,643 ÷ 4 = 16,215,410.75
If the quotient is a whole number, then 4 and 16,215,410.75 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 | 64,861,643 | |
| -1 | 64,861,643 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 49 | 77 | 343 | 539 | 3,773 | 17,191 | 120,337 | 189,101 | 842,359 | 1,323,707 | 5,896,513 | 9,265,949 | 64,861,643 |
| -1 | -7 | -11 | -49 | -77 | -343 | -539 | -3,773 | -17,191 | -120,337 | -189,101 | -842,359 | -1,323,707 | -5,896,513 | -9,265,949 | -64,861,643 |
Here are some more numbers to try:
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