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Factors and Coprimes 1-4

19. Find the sum of even factors of 5400.
a. 10360
b. 11360
c. 14360
d. 17360


20. Find the number of factors of 5400 which are multiples of 3.
a. 36
b. 39
c. 40
d. 52


21. Find the number of factors of 5400 which are multiples of 15.
a. 15
b. 16
c. 24
d. 28


22. Find the sum of factors of 5400 which are multiples of 5.
a. 18450
b. 19200
c. 27200
d. 37200