20269899

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:161

約数の個数: 64

約数和(自身を含む): 35481600

約数和(自身を除く): 15211701

約数列:

[1, 3, 9, 13, 17, 27, 39, 43, 51, 79, 117, 129, 153, 221, 237, 351, 387, 459, 559, 663, 711, 731, 1027, 1161, 1343, 1677, 1989, 2133, 2193, 3081, 3397, 4029, 5031, 5967, 6579, 9243, 9503, 10191, 12087, 15093, 17459, 19737, 27729, 28509, 30573, 36261, 44161, 52377, 57749, 85527, 91719, 132483, 157131, 173247, 256581, 397449, 471393, 519741, 750737, 1192347, 1559223, 2252211, 6756633, 20269899]

約数ペア:

[(1, 20269899), (3, 6756633), (9, 2252211), (13, 1559223), (17, 1192347), (27, 750737), (39, 519741), (43, 471393), (51, 397449), (79, 256581), (117, 173247), (129, 157131), (153, 132483), (221, 91719), (237, 85527), (351, 57749), (387, 52377), (459, 44161), (559, 36261), (663, 30573), (711, 28509), (731, 27729), (1027, 19737), (1161, 17459), (1343, 15093), (1677, 12087), (1989, 10191), (2133, 9503), (2193, 9243), (3081, 6579), (3397, 5967), (4029, 5031)]