A:
Positive:
1 x 7182456123 x 312280729 x 2476709257 x 279473419 x 171419667 x 1076835911 x 121517453 x 9637
Negative:
-1 x -71824561-23 x -3122807-29 x -2476709-257 x -279473-419 x -171419-667 x -107683-5911 x -12151-7453 x -9637
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 71,824,561, 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 | 71,824,561 | |
| -1 | -71,824,561 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 71,824,561.
Example:
1 x 71,824,561 = 71,824,561
and
-1 x -71,824,561 = 71,824,561
Notice both answers equal 71,824,561
With that explanation out of the way, let's continue. Next, we take the number 71,824,561 and divide it by 2:
71,824,561 ÷ 2 = 35,912,280.5
If the quotient is a whole number, then 2 and 35,912,280.5 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 | 71,824,561 | |
| -1 | -71,824,561 |
Now, we try dividing 71,824,561 by 3:
71,824,561 ÷ 3 = 23,941,520.3333
If the quotient is a whole number, then 3 and 23,941,520.3333 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 | 71,824,561 | |
| -1 | -71,824,561 |
Let's try dividing by 4:
71,824,561 ÷ 4 = 17,956,140.25
If the quotient is a whole number, then 4 and 17,956,140.25 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 | 71,824,561 | |
| -1 | 71,824,561 |
If you did it right, you will end up with this table:
| 1 | 23 | 29 | 257 | 419 | 667 | 5,911 | 7,453 | 9,637 | 12,151 | 107,683 | 171,419 | 279,473 | 2,476,709 | 3,122,807 | 71,824,561 |
| -1 | -23 | -29 | -257 | -419 | -667 | -5,911 | -7,453 | -9,637 | -12,151 | -107,683 | -171,419 | -279,473 | -2,476,709 | -3,122,807 | -71,824,561 |
Here are some more numbers to try:
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