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531mm = 20.91 inches
1 x 531 = 531
3 x 177 = 531
9 x 59 = 531
531 x 1 = 531 177 x 3 = 531 59 x 9 = 531
927-531 = 396
The factors of 531 are 1, 3, and 5 because it is premitive to 500.
The factors of 531 are 1, 3, 9, 59, and 531.