A:
Positive:
1 x 1931937119 x 101680961 x 31671179 x 244549211 x 915611159 x 166691501 x 128714009 x 4819
Negative:
-1 x -19319371-19 x -1016809-61 x -316711-79 x -244549-211 x -91561-1159 x -16669-1501 x -12871-4009 x -4819
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 19,319,371, 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 | 19,319,371 | |
| -1 | -19,319,371 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,319,371.
Example:
1 x 19,319,371 = 19,319,371
and
-1 x -19,319,371 = 19,319,371
Notice both answers equal 19,319,371
With that explanation out of the way, let's continue. Next, we take the number 19,319,371 and divide it by 2:
19,319,371 ÷ 2 = 9,659,685.5
If the quotient is a whole number, then 2 and 9,659,685.5 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 | 19,319,371 | |
| -1 | -19,319,371 |
Now, we try dividing 19,319,371 by 3:
19,319,371 ÷ 3 = 6,439,790.3333
If the quotient is a whole number, then 3 and 6,439,790.3333 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 | 19,319,371 | |
| -1 | -19,319,371 |
Let's try dividing by 4:
19,319,371 ÷ 4 = 4,829,842.75
If the quotient is a whole number, then 4 and 4,829,842.75 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 | 19,319,371 | |
| -1 | 19,319,371 |
If you did it right, you will end up with this table:
| 1 | 19 | 61 | 79 | 211 | 1,159 | 1,501 | 4,009 | 4,819 | 12,871 | 16,669 | 91,561 | 244,549 | 316,711 | 1,016,809 | 19,319,371 |
| -1 | -19 | -61 | -79 | -211 | -1,159 | -1,501 | -4,009 | -4,819 | -12,871 | -16,669 | -91,561 | -244,549 | -316,711 | -1,016,809 | -19,319,371 |
Here are some more numbers to try:
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