21000994576

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{26297}}^1$

素因数の和:26432

約数の個数: 80

約数和(自身を含む): 44609823360

約数和(自身を除く): 23608828784

約数列:

[1, 2, 4, 8, 16, 19, 37, 38, 71, 74, 76, 142, 148, 152, 284, 296, 304, 568, 592, 703, 1136, 1349, 1406, 2627, 2698, 2812, 5254, 5396, 5624, 10508, 10792, 11248, 21016, 21584, 26297, 42032, 49913, 52594, 99826, 105188, 199652, 210376, 399304, 420752, 499643, 798608, 972989, 999286, 1867087, 1945978, 1998572, 3734174, 3891956, 3997144, 7468348, 7783912, 7994288, 14936696, 15567824, 18486791, 29873392, 35474653, 36973582, 69082219, 70949306, 73947164, 138164438, 141898612, 147894328, 276328876, 283797224, 295788656, 552657752, 567594448, 1105315504, 1312562161, 2625124322, 5250248644, 10500497288, 21000994576]

約数ペア:

[(1, 21000994576), (2, 10500497288), (4, 5250248644), (8, 2625124322), (16, 1312562161), (19, 1105315504), (37, 567594448), (38, 552657752), (71, 295788656), (74, 283797224), (76, 276328876), (142, 147894328), (148, 141898612), (152, 138164438), (284, 73947164), (296, 70949306), (304, 69082219), (568, 36973582), (592, 35474653), (703, 29873392), (1136, 18486791), (1349, 15567824), (1406, 14936696), (2627, 7994288), (2698, 7783912), (2812, 7468348), (5254, 3997144), (5396, 3891956), (5624, 3734174), (10508, 1998572), (10792, 1945978), (11248, 1867087), (21016, 999286), (21584, 972989), (26297, 798608), (42032, 499643), (49913, 420752), (52594, 399304), (99826, 210376), (105188, 199652)]