Primes: 2, 2, 2, 2, 3, 5, 5
Others are any combination of the primes, i.e.
2 x 2 = 4
2 x 3 = 6
2 x 5 = 10
2 x 2 x 3 = 12
3 x 5 = 15
2 x 2 x 2 x 2 = 16
2 x 2 x 5 = 20
2 x 2 x 2 x 3 = 24
5 x 5 = 25
2 x 3 x 5 = 30
2 x 2 x 2 x 5 = 40
2 x 2 x 2 x 2 x 3 = 48
2 x 5 x 5 = 50
2 x 2 x 3 x 5 = 60
3 x 5 x 5 = 75
2 x 2 x 2 x 2 x 5 = 80
2 x 2 x 5 x 5 = 100
2 x 2 x 2 x 3 x 5 = 120
2 x 3 x 5 x 5 = 150
2 x 2 x 2 x 5 x 5 = 200
2 x 2 x 2 x 2 x 3 x 5 = 240
2 x 2 x 3 x 5 x 5 = 300
2 x 2 x 2 x 2 x 5 x 5 = 400
2 x 2 x 2 x 3 x 5 x 5 = 600
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The factors of 120 are:
1
2
3
4
5
6
8
10
12
15
20
24
30
40
60
120
Of course from this list, 2,3,and 5 are prime and the others are composite.
1 and 120 are often not considered proper factors, the others are. This is a matter of definition and is not 100% uniform.
factors: 1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200
prime factors: 2(3), 5(2), 11
The prime factors are 2, 3 and 5. Keep dividing the original number by those three and you'll find all the other factors.
120 = 2 x 2 x 2 x 3 x 5
120=8x3x5, but 8 is not a prime. We write 8 as 23 .Now the prime factorization is 23 x3x5. We stop because all the factors are primes raised to an exponent power..
LCM is 120, which is the multiple of the highest power of prime factors in the given numbers (23 x 3 x 5).
2 x 2 x 2 x 3 x 5 = 120
Prime factors are factors that are also prime numbers.