To find two numbers that multiply together to equal 405, we can start by finding the prime factorization of 405, which is 3 x 3 x 3 x 3 x 3 x 5. From this, we can see that the two numbers are 27 and 15, as 27 x 15 = 405.
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1 x 405, 3 x 135, 5 x 81, 9 x 45, 15 x 27
Since 405 is positive, using one negative number forces one to actually use two negative numbers. The pair -1x-405 would work for instance.
45 * 9 = 405
All multiples of 405, which is an infinite number.
In exponents: 34*5 = 405