40 = 20 × 2 is an example of the prime factorization process

Factors of 40 are numbers that, when multiplied in pairs give the product as 40. There are 8 factors of 40, which are 1, 2, 4, 5, 8, 10, 20, and 40. Here, 40 is the biggest factor. The Prime Factors and Pair Factors of 40 are 1, 2, 4, 5, 8, 10, 20, 40 and (1, 40), (2, 20), (4, 10) and (5, 8) respectively.