The operations of arithmetic are MEASURES:
www.academia.edu/118159696/The_operations_of_arithmetic_are_MEASURES
The difference between general and factor measure:
www.academia.edu/104575302/The_difference_between_general_measure_and_factor_measure
General measure can have different divisors. For example, 6 = 4 + 2.
Factor measure uses only ONE divisor. For example, 6 = 3 + 3.
Understanding Measure and Number:
www.academia.edu/78435135/Understanding_Measure_Ratio_and_Number
What exactly is a factor in mathematics:
www.academia.edu/105057161/What_exactly_is_a_factor_in_mathematics