Factors / Factors of 87

Factors of 87

1, 3, 29, 87

87 breaks into 2 pairs, tested up to √87 ≈ 9.3; each pair multiplies back to 87 exactly. 87's full pair list is (1, 87), (3, 29), for 4 divisors in total. 87's divisors other than 87 itself sum to just 33, 54 below 87: the common deficient case. 87 is odd, digit sum 15 for 87; small divisors of 87 include 3. 87 has 4 divisors; 86 has 4 and 88 has 8, so 88 wins here. 87 divided by its largest divisor, 29, gives 3.