1, 3, 5, 9, 15, 25, 45, 75, 225
3 and 5 are prime.
As a product of its prime factors: 3*3*5*5 = 225
225 has nine factors.
Factors are whole numbers that divide exactly into a whole number. These numbers have no remainder. Primes, on the other hand, have exactly two factors which are 1 and itself.
Six has four factors and is in between the twin primes 5 and 7.
The factors of 225 are: 1 3 5 9 15 25 45 75 225
The factors of 225 are: 1, 3, 5, 9, 15, 25, 45, 75, and 225.
Squares of primes.
11 x 457
Squares of primes.
Prime factors of 225=3x3x5x5.
32*52 = 225
225 has 2 prime factors namely 3 and 5.