The number is [tex]\boxed{16}[/tex] that has exactly five factors in between 1 to 20.
Further explanation:
Factors are the numbers that can be used to find the original number.
Prime numbers are those which have 2 only factors.
The numbers between 1 and 11 doesn’t have more than 3 factors.
The factors of 12 are 1, 2, 3, 4, 6 and 12.
12 have 6 factors.
The factors of 13 are 1 and 13.
13 have 2 factors.
The factors of 14 are 1, 2, 7 and 14.
14 have 4 factors.
The factors of 15 are 1, 3, 5 and 15.
15 have 4 factors.
The factors of 16 are 1, 2, 4, 8 and 16.
16 have 5 factors.
The factors of 17 are 1, and 17.
17 have 2 factors.
The factors of 18 are 1, 2, 3, 6, 9 and 18.
18 have 6 factors.
The factors of 19 are 1 and 19.
19 have 2 factors.
The factors of 20 are 1, 2, 4, 5, 10 and 20.
20 have 6 factors.
The number is [tex]\boxed{16}[/tex] that has exactly five factors in between 1 to 20.
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Answer details:
Grade: Middle School
Subject: Mathematics
Chapter: Comparing quantities
Keywords: Eduardo, number, factors, exactly, one, twenty, thinking, factorization, prime number, prime factorization.