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It is: 60+23 = 83
83/4 = 20.75 or 20 and 3/4
The positive integer factors of 644 are 1, 2, 4, 8, 83, 166, 332, 664. The prime factorization of 644 is 23 x 83
There are: 60+23 = 83 minutes
In 83 minutes , there is one hour. And left over 23 minutes.