A:
Positive:
1 x 17219517 x 24599311 x 15654119 x 9062977 x 22363107 x 16093121 x 14231133 x 12947209 x 8239749 x 2299847 x 20331177 x 1463
Negative:
-1 x -1721951-7 x -245993-11 x -156541-19 x -90629-77 x -22363-107 x -16093-121 x -14231-133 x -12947-209 x -8239-749 x -2299-847 x -2033-1177 x -1463
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 1,721,951, 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 | 1,721,951 | |
| -1 | -1,721,951 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,721,951.
Example:
1 x 1,721,951 = 1,721,951
and
-1 x -1,721,951 = 1,721,951
Notice both answers equal 1,721,951
With that explanation out of the way, let's continue. Next, we take the number 1,721,951 and divide it by 2:
1,721,951 ÷ 2 = 860,975.5
If the quotient is a whole number, then 2 and 860,975.5 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 | 1,721,951 | |
| -1 | -1,721,951 |
Now, we try dividing 1,721,951 by 3:
1,721,951 ÷ 3 = 573,983.6667
If the quotient is a whole number, then 3 and 573,983.6667 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 | 1,721,951 | |
| -1 | -1,721,951 |
Let's try dividing by 4:
1,721,951 ÷ 4 = 430,487.75
If the quotient is a whole number, then 4 and 430,487.75 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 | 1,721,951 | |
| -1 | 1,721,951 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 19 | 77 | 107 | 121 | 133 | 209 | 749 | 847 | 1,177 | 1,463 | 2,033 | 2,299 | 8,239 | 12,947 | 14,231 | 16,093 | 22,363 | 90,629 | 156,541 | 245,993 | 1,721,951 |
| -1 | -7 | -11 | -19 | -77 | -107 | -121 | -133 | -209 | -749 | -847 | -1,177 | -1,463 | -2,033 | -2,299 | -8,239 | -12,947 | -14,231 | -16,093 | -22,363 | -90,629 | -156,541 | -245,993 | -1,721,951 |
Here are some more numbers to try:
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