Just 2.
2 and 3
The only prime factor of 64 is 2.
64 = 2x2x2x2x2x2
Prime factor is 2. Factors are 1, 2, 4, 8, 16, 32, 64
The only prime factor of 64 is 2.
Prime factors of 64 are 26 (2x2x2x2x2x2)
64 has only one prime factor: 2
The only prime factor of 64 is 2.
The factors of 64 are 1, 2, 4, 8, 16, 32 and 64
64 = 26
The prime factor of 64 is 2.
64 has only one prime factor which is 2.