One male flower produces enough pollen to fertilize a number of female flowers. One further point, however. There is a possibility that your problem may be caused by a condition that is not related to fertilization. Some of the cobs have kernels missing here and there. On other cobs, many rows of kernels are absent.
Corn is monoecious remember.
Each cob is actually a flower that contains many female organs. . Above the cobs are the tassles, which are the male flowers. Pollen from the tassles is carried by the wind to the female organs, each of which will produce a single seed, or kernel, when fertilized. If kernels are absent the likely explanation is that pollen did not reach some female organs, probably because the wind carried the pollen away from the cob. Planting corn in squares rather than long rows will help to assure pollination.