20740720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1$

素因数の和:88

約数の個数: 240

約数和(自身を含む): 67683168

約数和(自身を除く): 46942448

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 26, 28, 35, 37, 40, 44, 49, 52, 55, 56, 65, 70, 74, 77, 80, 88, 91, 98, 104, 110, 112, 130, 140, 143, 148, 154, 176, 182, 185, 196, 208, 220, 245, 259, 260, 280, 286, 296, 308, 364, 370, 385, 392, 407, 440, 455, 481, 490, 518, 520, 539, 560, 572, 592, 616, 637, 715, 728, 740, 770, 784, 814, 880, 910, 962, 980, 1001, 1036, 1040, 1078, 1144, 1232, 1274, 1295, 1430, 1456, 1480, 1540, 1628, 1813, 1820, 1924, 1960, 2002, 2035, 2072, 2156, 2288, 2405, 2548, 2590, 2695, 2849, 2860, 2960, 3080, 3185, 3256, 3367, 3626, 3640, 3848, 3920, 4004, 4070, 4144, 4312, 4810, 5005, 5096, 5180, 5291, 5390, 5698, 5720, 6160, 6370, 6512, 6734, 7007, 7252, 7280, 7696, 8008, 8140, 8624, 9065, 9620, 10010, 10192, 10360, 10582, 10780, 11396, 11440, 12740, 13468, 14014, 14245, 14504, 16016, 16280, 16835, 18130, 19240, 19943, 20020, 20720, 21164, 21560, 22792, 23569, 25480, 26455, 26936, 28028, 28490, 29008, 32560, 33670, 35035, 36260, 37037, 38480, 39886, 40040, 42328, 43120, 45584, 47138, 50960, 52910, 53872, 56056, 56980, 67340, 70070, 72520, 74074, 79772, 80080, 84656, 94276, 99715, 105820, 112112, 113960, 117845, 134680, 140140, 145040, 148148, 159544, 185185, 188552, 199430, 211640, 227920, 235690, 259259, 269360, 280280, 296296, 319088, 370370, 377104, 398860, 423280, 471380, 518518, 560560, 592592, 740740, 797720, 942760, 1037036, 1296295, 1481480, 1595440, 1885520, 2074072, 2592590, 2962960, 4148144, 5185180, 10370360, 20740720]

約数ペア:

[(1, 20740720), (2, 10370360), (4, 5185180), (5, 4148144), (7, 2962960), (8, 2592590), (10, 2074072), (11, 1885520), (13, 1595440), (14, 1481480), (16, 1296295), (20, 1037036), (22, 942760), (26, 797720), (28, 740740), (35, 592592), (37, 560560), (40, 518518), (44, 471380), (49, 423280), (52, 398860), (55, 377104), (56, 370370), (65, 319088), (70, 296296), (74, 280280), (77, 269360), (80, 259259), (88, 235690), (91, 227920), (98, 211640), (104, 199430), (110, 188552), (112, 185185), (130, 159544), (140, 148148), (143, 145040), (148, 140140), (154, 134680), (176, 117845), (182, 113960), (185, 112112), (196, 105820), (208, 99715), (220, 94276), (245, 84656), (259, 80080), (260, 79772), (280, 74074), (286, 72520), (296, 70070), (308, 67340), (364, 56980), (370, 56056), (385, 53872), (392, 52910), (407, 50960), (440, 47138), (455, 45584), (481, 43120), (490, 42328), (518, 40040), (520, 39886), (539, 38480), (560, 37037), (572, 36260), (592, 35035), (616, 33670), (637, 32560), (715, 29008), (728, 28490), (740, 28028), (770, 26936), (784, 26455), (814, 25480), (880, 23569), (910, 22792), (962, 21560), (980, 21164), (1001, 20720), (1036, 20020), (1040, 19943), (1078, 19240), (1144, 18130), (1232, 16835), (1274, 16280), (1295, 16016), (1430, 14504), (1456, 14245), (1480, 14014), (1540, 13468), (1628, 12740), (1813, 11440), (1820, 11396), (1924, 10780), (1960, 10582), (2002, 10360), (2035, 10192), (2072, 10010), (2156, 9620), (2288, 9065), (2405, 8624), (2548, 8140), (2590, 8008), (2695, 7696), (2849, 7280), (2860, 7252), (2960, 7007), (3080, 6734), (3185, 6512), (3256, 6370), (3367, 6160), (3626, 5720), (3640, 5698), (3848, 5390), (3920, 5291), (4004, 5180), (4070, 5096), (4144, 5005), (4312, 4810)]