218957823

素因数分解:

$3^5\times 7^3\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 96

約数和(自身を含む): 398361600

約数和(自身を除く): 179403777

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 63, 71, 81, 111, 147, 189, 213, 243, 259, 333, 343, 441, 497, 567, 639, 777, 999, 1029, 1323, 1491, 1701, 1813, 1917, 2331, 2627, 2997, 3087, 3479, 3969, 4473, 5439, 5751, 6993, 7881, 8991, 9261, 10437, 11907, 12691, 13419, 16317, 17253, 18389, 20979, 23643, 24353, 27783, 31311, 38073, 40257, 48951, 55167, 62937, 70929, 73059, 83349, 93933, 114219, 120771, 128723, 146853, 165501, 212787, 219177, 281799, 342657, 386169, 440559, 496503, 638361, 657531, 845397, 901061, 1027971, 1158507, 1489509, 1972593, 2703183, 3083913, 3475521, 4468527, 5917779, 8109549, 10426563, 24328647, 31279689, 72985941, 218957823]

約数ペア:

[(1, 218957823), (3, 72985941), (7, 31279689), (9, 24328647), (21, 10426563), (27, 8109549), (37, 5917779), (49, 4468527), (63, 3475521), (71, 3083913), (81, 2703183), (111, 1972593), (147, 1489509), (189, 1158507), (213, 1027971), (243, 901061), (259, 845397), (333, 657531), (343, 638361), (441, 496503), (497, 440559), (567, 386169), (639, 342657), (777, 281799), (999, 219177), (1029, 212787), (1323, 165501), (1491, 146853), (1701, 128723), (1813, 120771), (1917, 114219), (2331, 93933), (2627, 83349), (2997, 73059), (3087, 70929), (3479, 62937), (3969, 55167), (4473, 48951), (5439, 40257), (5751, 38073), (6993, 31311), (7881, 27783), (8991, 24353), (9261, 23643), (10437, 20979), (11907, 18389), (12691, 17253), (13419, 16317)]