19989151

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{277}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 25233504

約数和(自身を除く): 5244353

約数列:

[1, 7, 13, 61, 91, 169, 277, 427, 793, 1183, 1939, 3601, 5551, 10309, 16897, 25207, 46813, 72163, 118279, 219661, 327691, 1537627, 2855593, 19989151]

約数ペア:

[(1, 19989151), (7, 2855593), (13, 1537627), (61, 327691), (91, 219661), (169, 118279), (277, 72163), (427, 46813), (793, 25207), (1183, 16897), (1939, 10309), (3601, 5551)]