A:
Positive:
1 x 194185455 x 388370929 x 669605145 x 133921157 x 123685785 x 24737853 x 227654265 x 4553
Negative:
-1 x -19418545-5 x -3883709-29 x -669605-145 x -133921-157 x -123685-785 x -24737-853 x -22765-4265 x -4553
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 19,418,545, 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 | 19,418,545 | |
| -1 | -19,418,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,418,545.
Example:
1 x 19,418,545 = 19,418,545
and
-1 x -19,418,545 = 19,418,545
Notice both answers equal 19,418,545
With that explanation out of the way, let's continue. Next, we take the number 19,418,545 and divide it by 2:
19,418,545 ÷ 2 = 9,709,272.5
If the quotient is a whole number, then 2 and 9,709,272.5 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 | 19,418,545 | |
| -1 | -19,418,545 |
Now, we try dividing 19,418,545 by 3:
19,418,545 ÷ 3 = 6,472,848.3333
If the quotient is a whole number, then 3 and 6,472,848.3333 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 | 19,418,545 | |
| -1 | -19,418,545 |
Let's try dividing by 4:
19,418,545 ÷ 4 = 4,854,636.25
If the quotient is a whole number, then 4 and 4,854,636.25 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 | 19,418,545 | |
| -1 | 19,418,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 157 | 785 | 853 | 4,265 | 4,553 | 22,765 | 24,737 | 123,685 | 133,921 | 669,605 | 3,883,709 | 19,418,545 |
| -1 | -5 | -29 | -145 | -157 | -785 | -853 | -4,265 | -4,553 | -22,765 | -24,737 | -123,685 | -133,921 | -669,605 | -3,883,709 | -19,418,545 |
Here are some more numbers to try:
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