A:
Positive:
1 x 615031455 x 1230062911 x 559119555 x 1118239751 x 818951489 x 413053755 x 163797445 x 8261
Negative:
-1 x -61503145-5 x -12300629-11 x -5591195-55 x -1118239-751 x -81895-1489 x -41305-3755 x -16379-7445 x -8261
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 61,503,145, 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 | 61,503,145 | |
| -1 | -61,503,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 61,503,145.
Example:
1 x 61,503,145 = 61,503,145
and
-1 x -61,503,145 = 61,503,145
Notice both answers equal 61,503,145
With that explanation out of the way, let's continue. Next, we take the number 61,503,145 and divide it by 2:
61,503,145 ÷ 2 = 30,751,572.5
If the quotient is a whole number, then 2 and 30,751,572.5 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 | 61,503,145 | |
| -1 | -61,503,145 |
Now, we try dividing 61,503,145 by 3:
61,503,145 ÷ 3 = 20,501,048.3333
If the quotient is a whole number, then 3 and 20,501,048.3333 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 | 61,503,145 | |
| -1 | -61,503,145 |
Let's try dividing by 4:
61,503,145 ÷ 4 = 15,375,786.25
If the quotient is a whole number, then 4 and 15,375,786.25 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 | 61,503,145 | |
| -1 | 61,503,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 751 | 1,489 | 3,755 | 7,445 | 8,261 | 16,379 | 41,305 | 81,895 | 1,118,239 | 5,591,195 | 12,300,629 | 61,503,145 |
| -1 | -5 | -11 | -55 | -751 | -1,489 | -3,755 | -7,445 | -8,261 | -16,379 | -41,305 | -81,895 | -1,118,239 | -5,591,195 | -12,300,629 | -61,503,145 |
Here are some more numbers to try:
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