16 and 81 have 5 factors
625 has five factors.
A number that has exactly an odd number of factors is a power of another number. A number between 10 and 30 that is a power is 16. It is 24 (as well as 42) and its factors are 1, 2, 4, 8, and 16.
625 has five factors.16 does, among others.
Indeed, the number 16 has 5 factors, 1, 2, 4, 8, and 16.
A prime number, like 2, 3 or 5.
16
16
16
16 does.
A prime number has exactly two factors.
16
A number with exactly five factors is a number that is a prime number raised to the fourth power (p4). The factors are 1, p, p2, p3, and p4. Examples: The 5 factors of 24 = 16 are 1, 2, 4, 8, and 16. The 5 factors of 34 = 81 are 1, 3, 9, 27, and 81. The 5 factors of 54 = 625 are 1, 5, 25, 125, and 625.