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Find the total number of factors of 513 + 512 + 511 + 510.1. 1322. 1433. 464. 20 |
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Answer» Correct Answer - Option 1 : 132 Given: The number is 513 + 512 + 511 + 510 Concept used: If the number can be expressed as pa.qb.rc.sd, where p, q, r, and s are prime numbers and a, b, c and d are whole numbers, Then total number of factors of the number = (a + 1) × (b + 1) × (c + 1) × (d + 1) Calculation: 513 + 512 + 511 + 510 ⇒ 510 × (53 + 52 + 5 + 1) ⇒ 510 × (125 + 25 + 5 + 1) ⇒ 510 × 156 ⇒ 510 × 2 × 2 × 3 × 13 ⇒ 510 × 22 × 31 × 131 Total number of factors = (10 + 1) × (2 + 1) × (1 + 1) × (1 + 1) ⇒ Total number of factors = 11 × 3 × 2 × 2 ∴ Total number of factors are 132 |
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