Factors / Factors of 538

Factors of 538

1, 2, 269, 538

538 breaks into 2 pairs, tested up to √538 ≈ 23.2; each pair multiplies back to 538 exactly. 538's full pair list is (1, 538), (2, 269), for 4 divisors in total. 538's divisors other than 538 itself sum to just 272, 266 below 538: the common deficient case. 538 is even, digit sum 16 for 538; small divisors of 538 include 2. 538 has 4 divisors; 537 has 4 and 539 has 6, so 539 wins here. 538 divided by its largest divisor, 269, gives 2.