Question

What is the least whole number that has exactly 7 factors including 1 and itself?

Answer 1

No number has exactly 7 factors including one and itself.

Answer 2

64

Explanation:

Pairs: (1,64), (2, 32), (4, 16), (8, 8)

Note: 8 only counts as 1 factor (not 2)

Factors: 1, 2, 4, 8, 16, 32, 64

count them and you get 7 factors