1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252
2x2x3x3x7=252
The numbers for the vertebrates are 252.
12 and 252
252
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126 and 252, among others.
How about 2 times 126 = 252 as one example
252
1+251
252 2x126 2x2x63 2x2x3x3x7
The least common multiple of the numbers 180 and 252 is 1,260.
As a product of its prime factors: 2*2*3*3*7 = 252