21186516

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{337}}^1$

素因数の和:401

約数の個数: 72

約数和(自身を含む): 55421184

約数和(自身を除く): 34234668

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 31, 39, 52, 62, 78, 93, 124, 156, 169, 186, 337, 338, 372, 403, 507, 674, 676, 806, 1011, 1014, 1209, 1348, 1612, 2022, 2028, 2418, 4044, 4381, 4836, 5239, 8762, 10447, 10478, 13143, 15717, 17524, 20894, 20956, 26286, 31341, 31434, 41788, 52572, 56953, 62682, 62868, 113906, 125364, 135811, 170859, 227812, 271622, 341718, 407433, 543244, 683436, 814866, 1629732, 1765543, 3531086, 5296629, 7062172, 10593258, 21186516]

約数ペア:

[(1, 21186516), (2, 10593258), (3, 7062172), (4, 5296629), (6, 3531086), (12, 1765543), (13, 1629732), (26, 814866), (31, 683436), (39, 543244), (52, 407433), (62, 341718), (78, 271622), (93, 227812), (124, 170859), (156, 135811), (169, 125364), (186, 113906), (337, 62868), (338, 62682), (372, 56953), (403, 52572), (507, 41788), (674, 31434), (676, 31341), (806, 26286), (1011, 20956), (1014, 20894), (1209, 17524), (1348, 15717), (1612, 13143), (2022, 10478), (2028, 10447), (2418, 8762), (4044, 5239), (4381, 4836)]