21265128

素因数分解:

$2^3\times 3^2\times {\mathrm{263}}^1\times {\mathrm{1123}}^1$

素因数の和:1398

約数の個数: 48

約数和(自身を含む): 57863520

約数和(自身を除く): 36598392

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 263, 526, 789, 1052, 1123, 1578, 2104, 2246, 2367, 3156, 3369, 4492, 4734, 6312, 6738, 8984, 9468, 10107, 13476, 18936, 20214, 26952, 40428, 80856, 295349, 590698, 886047, 1181396, 1772094, 2362792, 2658141, 3544188, 5316282, 7088376, 10632564, 21265128]

約数ペア:

[(1, 21265128), (2, 10632564), (3, 7088376), (4, 5316282), (6, 3544188), (8, 2658141), (9, 2362792), (12, 1772094), (18, 1181396), (24, 886047), (36, 590698), (72, 295349), (263, 80856), (526, 40428), (789, 26952), (1052, 20214), (1123, 18936), (1578, 13476), (2104, 10107), (2246, 9468), (2367, 8984), (3156, 6738), (3369, 6312), (4492, 4734)]