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# What numbers under 100.prime have 3 prime factors?

Updated: 10/17/2022

Wiki User

10y ago

Numbers under 100 with three different prime factors are 30, 42, 66, 70 and 78.

Numbers under 100 with three different prime factors, at least one of which has multiplicity > 1 are 8, 12, 18, 20, 27, 28, 44, 45, 50, 52, 63, 68, 75, 76, 92, 98 and 99.

Wiki User

10y ago

Wiki User

9y ago

They are:

8, 12, 18, 20, 27,

28, 30, 42, 44, 45,

50, 52, 63, 66, 68,

70, 75, 76, 78, 92,

98, 99.

There are some that have more than 3 - which means that they do have 3.

[That last part is like the old riddle: how many months have 28 days - and the answer is all of them. Eleven have more than 28, but they do have 28.]

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