20749680

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:228

約数の個数: 240

約数和(自身を含む): 83566080

約数和(自身を除く): 62816400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 23, 24, 28, 30, 35, 36, 40, 42, 45, 46, 48, 56, 60, 63, 69, 70, 72, 80, 84, 90, 92, 105, 112, 115, 120, 126, 138, 140, 144, 161, 168, 179, 180, 184, 207, 210, 230, 240, 252, 276, 280, 315, 322, 336, 345, 358, 360, 368, 414, 420, 460, 483, 504, 537, 552, 560, 630, 644, 690, 716, 720, 805, 828, 840, 895, 920, 966, 1008, 1035, 1074, 1104, 1253, 1260, 1288, 1380, 1432, 1449, 1610, 1611, 1656, 1680, 1790, 1840, 1932, 2070, 2148, 2415, 2506, 2520, 2576, 2685, 2760, 2864, 2898, 3220, 3222, 3312, 3580, 3759, 3864, 4117, 4140, 4296, 4830, 5012, 5040, 5370, 5520, 5796, 6265, 6440, 6444, 7160, 7245, 7518, 7728, 8055, 8234, 8280, 8592, 9660, 10024, 10740, 11277, 11592, 12351, 12530, 12880, 12888, 14320, 14490, 15036, 16110, 16468, 16560, 18795, 19320, 20048, 20585, 21480, 22554, 23184, 24702, 25060, 25776, 28819, 28980, 30072, 32220, 32936, 37053, 37590, 38640, 41170, 42960, 45108, 49404, 50120, 56385, 57638, 57960, 60144, 61755, 64440, 65872, 74106, 75180, 82340, 86457, 90216, 98808, 100240, 112770, 115276, 115920, 123510, 128880, 144095, 148212, 150360, 164680, 172914, 180432, 185265, 197616, 225540, 230552, 247020, 259371, 288190, 296424, 300720, 329360, 345828, 370530, 432285, 451080, 461104, 494040, 518742, 576380, 592848, 691656, 741060, 864570, 902160, 988080, 1037484, 1152760, 1296855, 1383312, 1482120, 1729140, 2074968, 2305520, 2593710, 2964240, 3458280, 4149936, 5187420, 6916560, 10374840, 20749680]

約数ペア:

[(1, 20749680), (2, 10374840), (3, 6916560), (4, 5187420), (5, 4149936), (6, 3458280), (7, 2964240), (8, 2593710), (9, 2305520), (10, 2074968), (12, 1729140), (14, 1482120), (15, 1383312), (16, 1296855), (18, 1152760), (20, 1037484), (21, 988080), (23, 902160), (24, 864570), (28, 741060), (30, 691656), (35, 592848), (36, 576380), (40, 518742), (42, 494040), (45, 461104), (46, 451080), (48, 432285), (56, 370530), (60, 345828), (63, 329360), (69, 300720), (70, 296424), (72, 288190), (80, 259371), (84, 247020), (90, 230552), (92, 225540), (105, 197616), (112, 185265), (115, 180432), (120, 172914), (126, 164680), (138, 150360), (140, 148212), (144, 144095), (161, 128880), (168, 123510), (179, 115920), (180, 115276), (184, 112770), (207, 100240), (210, 98808), (230, 90216), (240, 86457), (252, 82340), (276, 75180), (280, 74106), (315, 65872), (322, 64440), (336, 61755), (345, 60144), (358, 57960), (360, 57638), (368, 56385), (414, 50120), (420, 49404), (460, 45108), (483, 42960), (504, 41170), (537, 38640), (552, 37590), (560, 37053), (630, 32936), (644, 32220), (690, 30072), (716, 28980), (720, 28819), (805, 25776), (828, 25060), (840, 24702), (895, 23184), (920, 22554), (966, 21480), (1008, 20585), (1035, 20048), (1074, 19320), (1104, 18795), (1253, 16560), (1260, 16468), (1288, 16110), (1380, 15036), (1432, 14490), (1449, 14320), (1610, 12888), (1611, 12880), (1656, 12530), (1680, 12351), (1790, 11592), (1840, 11277), (1932, 10740), (2070, 10024), (2148, 9660), (2415, 8592), (2506, 8280), (2520, 8234), (2576, 8055), (2685, 7728), (2760, 7518), (2864, 7245), (2898, 7160), (3220, 6444), (3222, 6440), (3312, 6265), (3580, 5796), (3759, 5520), (3864, 5370), (4117, 5040), (4140, 5012), (4296, 4830)]