A:
Positive:
1 x 64142519919 x 33759221151 x 4247849179 x 35833811249 x 5135512869 x 2235713401 x 18859923731 x 27029
Negative:
-1 x -641425199-19 x -33759221-151 x -4247849-179 x -3583381-1249 x -513551-2869 x -223571-3401 x -188599-23731 x -27029
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 641,425,199, 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 | 641,425,199 | |
| -1 | -641,425,199 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 641,425,199.
Example:
1 x 641,425,199 = 641,425,199
and
-1 x -641,425,199 = 641,425,199
Notice both answers equal 641,425,199
With that explanation out of the way, let's continue. Next, we take the number 641,425,199 and divide it by 2:
641,425,199 ÷ 2 = 320,712,599.5
If the quotient is a whole number, then 2 and 320,712,599.5 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 | 641,425,199 | |
| -1 | -641,425,199 |
Now, we try dividing 641,425,199 by 3:
641,425,199 ÷ 3 = 213,808,399.6667
If the quotient is a whole number, then 3 and 213,808,399.6667 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 | 641,425,199 | |
| -1 | -641,425,199 |
Let's try dividing by 4:
641,425,199 ÷ 4 = 160,356,299.75
If the quotient is a whole number, then 4 and 160,356,299.75 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 | 641,425,199 | |
| -1 | 641,425,199 |
If you did it right, you will end up with this table:
| 1 | 19 | 151 | 179 | 1,249 | 2,869 | 3,401 | 23,731 | 27,029 | 188,599 | 223,571 | 513,551 | 3,583,381 | 4,247,849 | 33,759,221 | 641,425,199 |
| -1 | -19 | -151 | -179 | -1,249 | -2,869 | -3,401 | -23,731 | -27,029 | -188,599 | -223,571 | -513,551 | -3,583,381 | -4,247,849 | -33,759,221 | -641,425,199 |
Here are some more numbers to try:
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