Question 1139003
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If  N = p*q*r  is the product of 3 prime numbers p, q and r, then

 
the divisors of N, that are not 1 or primes are  pq, pr, qr and the number N itself.


So, the answer is 4, equal to the cardinality of the set  {pq, pr, qr, N }.


<U>ANSWER</U>.  4.
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