A:
Positive:
1 x 158776455 x 31755297 x 226823529 x 54750535 x 453647145 x 109501203 x 782151015 x 15643
Negative:
-1 x -15877645-5 x -3175529-7 x -2268235-29 x -547505-35 x -453647-145 x -109501-203 x -78215-1015 x -15643
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 15,877,645, 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 | 15,877,645 | |
| -1 | -15,877,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,877,645.
Example:
1 x 15,877,645 = 15,877,645
and
-1 x -15,877,645 = 15,877,645
Notice both answers equal 15,877,645
With that explanation out of the way, let's continue. Next, we take the number 15,877,645 and divide it by 2:
15,877,645 ÷ 2 = 7,938,822.5
If the quotient is a whole number, then 2 and 7,938,822.5 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 | 15,877,645 | |
| -1 | -15,877,645 |
Now, we try dividing 15,877,645 by 3:
15,877,645 ÷ 3 = 5,292,548.3333
If the quotient is a whole number, then 3 and 5,292,548.3333 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 | 15,877,645 | |
| -1 | -15,877,645 |
Let's try dividing by 4:
15,877,645 ÷ 4 = 3,969,411.25
If the quotient is a whole number, then 4 and 3,969,411.25 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 | 15,877,645 | |
| -1 | 15,877,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 29 | 35 | 145 | 203 | 1,015 | 15,643 | 78,215 | 109,501 | 453,647 | 547,505 | 2,268,235 | 3,175,529 | 15,877,645 |
| -1 | -5 | -7 | -29 | -35 | -145 | -203 | -1,015 | -15,643 | -78,215 | -109,501 | -453,647 | -547,505 | -2,268,235 | -3,175,529 | -15,877,645 |
Here are some more numbers to try:
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