There are three factor pairs for 44:
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1 and 44 2 and 22 4 and 11
The factor pairs of 44 are (1, 44), (2, 22), and (4, 11).
The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
-56
Because 2 can divide evenly into 44 with no remainder. Every even number has two as a factor.