Four of them.
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I only find three of them . . . 12, 36, and 60 .
Maybe Eb will come back and show us the fourth one.
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4, 12, 36
Four of them.
Three of them are . . . 4, 12, and 36.
A prime number is a positive integer that has exactly two factors - 1 and itself. A prime number has only two factors which are itself and one.
10