If p and q are prime numbers, how many divisors does the product have? Prime factorization would suggest that the answer is 18, but apparently it is 28. Please explain. Thanks.
Follow Math Help Forum on Facebook and Google+
Originally Posted by skyd171 If p and q are prime numbers, how many divisors does the product have? Prime factorization would suggest that the answer is 18, but apparently it is 28. Please explain. Thanks. You forgot the cases . In general , recall that is multiplicative and .
wonderful. Is it correct that the sigma, in this context, means "the number of unique divisors of"?
Originally Posted by skyd171 wonderful. Is it correct that the sigma, in this context, means "the number of unique divisors of"? I don't know what unique divisor means, but it is the number of divisors, it is a special case of the more general divisor function.
View Tag Cloud