Prime Factorization of 28

"Prime Factorization" Calculator

What is the Prime Factorization of 28?

Answer

Prime Factors of 28:

2, 2, 7

28 = 2² × 7 · composite · 6 factors · 3 prime factors counting repeats

Division ladder

28	2
14	2
7	7
1

Left: what is left; right: the smallest prime that divides it; 1 at the bottom.

Second way — factor tree

Related Calculations

See Also

Factors of a Number - List all Factors and Factor Pairs of a Number
Prime Number Checker - Find out whether a given number is Prime or not
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

Recalculate with different values ↑

Prime Factorization Table

Number	Prime Factors
13	13
14	2, 7
15	3, 5
16	2⁴
17	17
18	2 × 3²
19	19
20	2² × 5
21	3, 7
22	2, 11
23	23
24	2³ × 3
25	5²
26	2, 13
27	3³
28	2² × 7
29	29
30	2, 3, 5
31	31
32	2⁵
33	3, 11
34	2, 17
35	5, 7
36	2² × 3²
37	37
38	2, 19
39	3, 13
40	2³ × 5
41	41
42	2, 3, 7

FAQ

What is the Prime Factorization of 28?

Prime Factors of 28: 2, 2, 7

How many prime factors does 28 have?

Number 28 has 3 prime factors counting repeats; 2 different: 2 and 7.

What is the Prime Factorization of 28 in exponential form?

The Prime Factorization of the number 28 in the exponential form is: 2² × 7