What are the numbers that have exactly 3 factors?

Answer 1

The squares of prime numbers have exactly three factors.

4 has 1, 2, and 4.

9 has 1, 3, and 9.

25 has 1, 5, and 25.

49 has 1, 7, and 49.

121 has 1, 11, and 121.

169 has 1, 13, and 169.

Answer 2

Well, darling, the only numbers that have exactly 3 factors are perfect squares of prime numbers. So, we're talking about numbers like 4, 9, 25, and so on. Anything else and you're barking up the wrong tree.

Answer 3

1

Answer 4

121, 25, 4, 9, 49

Answer 5

what 2-digit number that has only 3 factors and is less than 30 which one is the number?

Answer 6

78

Answer 7

3

Answer 8

8

Answer 9

15

Answer 10

54