Factors: 1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575
Prime Factors: 3*3*5*5*7
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As a product of its prime factors: 3*3*5*5*7 = 1575
As a product of its prime factors: 3*3*5*5*7 = 1575
1575 = 3 * 3 * 5 * 5 * 73 x 3 x 5 x 5 x 7 = 1575
105, 210, 315, 420, and 525 have 3, 5 and 7 as prime factors. 105, 315, 525, 735 and 1575 have 3, 5 and 7 as their only prime factors.
3 x 3 x 5 x 5 x 7 = 1,575