For composite numbers, only one string of factors is the longest; the prime factorization.
There can be infinitely many distinct factors.
Nine factors.
2, 3, 5,
If p, q and r are distinct primes and n=pxqxr then n will have 8 factors, all of which will be positive since prime numbers are all positive, which are: n(pqr), pq, pr, qr, p, q, r and 1. Here there were 3 distinct primes so the number of positive factors is 2^3. In general if you had p distinct primes then you would have 2^p positive factors.
one
For composite numbers, only one string of factors is the longest; the prime factorization.
It varies with each given number.
Well, honey, in the number 840, there are 4 longest strings: "8", "4", and two "0"s. Looks like you hit the jackpot with those long strings, but don't get too excited - they're just numbers, after all.
Only one can be longest.
There can be infinitely many distinct factors.
Six distinct factors Two distinct prime factors
Twelve distinct factors.
Seven distinct factors.
Three distinct prime factors.
The distinct prime factors of 70 are 2, 5, and 7, so it has three distinct prime factors.
Six factors.