Factors / Factors of 247

Factors of 247

1, 13, 19, 247

247 breaks into 2 pairs, tested up to √247 ≈ 15.7; each pair multiplies back to 247 exactly. 247's full pair list is (1, 247), (13, 19), for 4 divisors in total. 247's divisors other than 247 itself sum to just 33, 214 below 247: the common deficient case. 247 is odd, digit sum 13 for 247; none of 2-12 divide 247 evenly. 247 has 4 divisors; 246 has 8 and 248 has 8, so 246 wins here. 247 divided by its largest divisor, 19, gives 13.