840 = 23 x 3 x 5 x 7
It is: 24*112 = 1936
It is: 2^4 times 3^2 = 144
2^2 x 3 x 5
Numbers that have 2 factors are prime numbers; Numbers that have 4 factors are either: * the cube of a prime; or * the product of two different primes; Numbers that have 8 factors are either: * a prime to the power 7; * the product of a prime cubed and different prime; * the product of three different primes.
The product of the prime numbers 3 and 5 is 15.
23 x 33 = 216
2^2 x 3 x 5 = 60
It is: 2^5 times 5^1 = 160
80 as a product of prime numbers can be expressed as: 2x2x2x2x5
2x2x2x3x5x7.
As a product of its prime factors: 2*61 = 122.
It is: 24*112 = 1936
Neither 90 nor 500 are prime numbers.
2x2x2x3 = 24
420=2x2x3x5x7
360= 23 times 45
As a product of its prime factors: 5^3 times 13 = 1625