One.
The only factor pair of 23 is 1 and 23
1 x 23
The factor pairs of 46 are 1 x 46 and 2 x 23.
The factor pairs of 437 are 1 x 437 and 19 x 23.
Sixteen factor pairs.
The factor pairs of 92 are 1 x 92, 2 x 46, and 4 x 23.
(1, 253) and (11, 23)
30 has four factor pairs:30,115,210,36,5
20 has 3 factor pairs. Pairs are (1,20), (2,10) and (9,9)
12 has 3 factor pairs and the pairs are (1,12), (2,6) and (3,4).
Humans have 23 pairs of chromosomes.
23 pairs.