The main factors of 70 is 2 x 5 x 7. To put it differently, 70 can be expressed as a product of its prime elements which are 2, 5, and 7. The number 70 can be expressed as a product of its prime factors 2, 5, and 7 is known as prime decomposition of 70. Such divisors are the building blocks that make up the number 70. By performing the method of finding the prime factors on 70, we can determine that 2, 5, and 7 are its prime factors. Basically, we are breaking down the number 70 into its constituent fundamental elements. Decomposing the number 70 into its prime divisors 2, 5, and 7 is called the prime factorization of 70. By doing this we are expressing 70 as a product of its prime factors.