A:
Positive:
1 x 78124977 x 111607111 x 71022777 x 101461241 x 32417421 x 185571687 x 46312651 x 2947
Negative:
-1 x -7812497-7 x -1116071-11 x -710227-77 x -101461-241 x -32417-421 x -18557-1687 x -4631-2651 x -2947
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 7,812,497, 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 | 7,812,497 | |
| -1 | -7,812,497 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,812,497.
Example:
1 x 7,812,497 = 7,812,497
and
-1 x -7,812,497 = 7,812,497
Notice both answers equal 7,812,497
With that explanation out of the way, let's continue. Next, we take the number 7,812,497 and divide it by 2:
7,812,497 ÷ 2 = 3,906,248.5
If the quotient is a whole number, then 2 and 3,906,248.5 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 | 7,812,497 | |
| -1 | -7,812,497 |
Now, we try dividing 7,812,497 by 3:
7,812,497 ÷ 3 = 2,604,165.6667
If the quotient is a whole number, then 3 and 2,604,165.6667 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 | 7,812,497 | |
| -1 | -7,812,497 |
Let's try dividing by 4:
7,812,497 ÷ 4 = 1,953,124.25
If the quotient is a whole number, then 4 and 1,953,124.25 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 | 7,812,497 | |
| -1 | 7,812,497 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 241 | 421 | 1,687 | 2,651 | 2,947 | 4,631 | 18,557 | 32,417 | 101,461 | 710,227 | 1,116,071 | 7,812,497 |
| -1 | -7 | -11 | -77 | -241 | -421 | -1,687 | -2,651 | -2,947 | -4,631 | -18,557 | -32,417 | -101,461 | -710,227 | -1,116,071 | -7,812,497 |
Here are some more numbers to try:
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