Multiply them.
3 x 3 x 5 x 7 = 315
The four prime numbers that multiply to make 315 are 3, 3, 5, and 7. Specifically, 315 can be factored as (3^2 \times 5 \times 7). Thus, the prime factors include the repeated prime number 3 along with 5 and 7.
5,5,7 and 7.
2x2x2x2=16
40 & 4
The prime factorization of 24 is 2x2x2x3.
No they are not prime numbers because 4 is composite.
4 is not prime.
3*3*4
2x3x3x3
1, 2,3,7
As a product of its prime factors: 3*5*5*5 = 375
As a product of its prime factors: 5*5*7*7 = 1225