A:
Positive:
1 x 641425617 x 916322323 x 278880753 x 1210237161 x 398401371 x 1728911219 x 526197517 x 8533
Negative:
-1 x -64142561-7 x -9163223-23 x -2788807-53 x -1210237-161 x -398401-371 x -172891-1219 x -52619-7517 x -8533
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 64,142,561, 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 | 64,142,561 | |
| -1 | -64,142,561 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,142,561.
Example:
1 x 64,142,561 = 64,142,561
and
-1 x -64,142,561 = 64,142,561
Notice both answers equal 64,142,561
With that explanation out of the way, let's continue. Next, we take the number 64,142,561 and divide it by 2:
64,142,561 ÷ 2 = 32,071,280.5
If the quotient is a whole number, then 2 and 32,071,280.5 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 | 64,142,561 | |
| -1 | -64,142,561 |
Now, we try dividing 64,142,561 by 3:
64,142,561 ÷ 3 = 21,380,853.6667
If the quotient is a whole number, then 3 and 21,380,853.6667 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 | 64,142,561 | |
| -1 | -64,142,561 |
Let's try dividing by 4:
64,142,561 ÷ 4 = 16,035,640.25
If the quotient is a whole number, then 4 and 16,035,640.25 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 | 64,142,561 | |
| -1 | 64,142,561 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 53 | 161 | 371 | 1,219 | 7,517 | 8,533 | 52,619 | 172,891 | 398,401 | 1,210,237 | 2,788,807 | 9,163,223 | 64,142,561 |
| -1 | -7 | -23 | -53 | -161 | -371 | -1,219 | -7,517 | -8,533 | -52,619 | -172,891 | -398,401 | -1,210,237 | -2,788,807 | -9,163,223 | -64,142,561 |
Here are some more numbers to try:
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