20991960

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:84

約数の個数: 320

約数和(自身を含む): 83635200

約数和(自身を除く): 62643240

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 19, 20, 22, 24, 27, 30, 31, 33, 36, 38, 40, 44, 45, 54, 55, 57, 60, 62, 66, 72, 76, 81, 88, 90, 93, 95, 99, 108, 110, 114, 120, 124, 132, 135, 152, 155, 162, 165, 171, 180, 186, 190, 198, 209, 216, 220, 228, 248, 264, 270, 279, 285, 297, 310, 324, 330, 341, 342, 360, 372, 380, 396, 405, 418, 440, 456, 465, 495, 513, 540, 558, 570, 589, 594, 620, 627, 648, 660, 682, 684, 744, 760, 792, 810, 836, 837, 855, 891, 930, 990, 1023, 1026, 1045, 1080, 1116, 1140, 1178, 1188, 1240, 1254, 1320, 1364, 1368, 1395, 1485, 1539, 1620, 1672, 1674, 1705, 1710, 1767, 1782, 1860, 1881, 1980, 2046, 2052, 2090, 2232, 2280, 2356, 2376, 2508, 2511, 2565, 2728, 2790, 2945, 2970, 3069, 3078, 3135, 3240, 3348, 3410, 3420, 3534, 3564, 3720, 3762, 3960, 4092, 4104, 4180, 4185, 4455, 4712, 5016, 5022, 5115, 5130, 5301, 5580, 5643, 5890, 5940, 6138, 6156, 6270, 6479, 6696, 6820, 6840, 7068, 7128, 7524, 7695, 8184, 8360, 8370, 8835, 8910, 9207, 9405, 10044, 10230, 10260, 10602, 11160, 11286, 11780, 11880, 12276, 12312, 12540, 12555, 12958, 13640, 14136, 15048, 15345, 15390, 15903, 16740, 16929, 17670, 17820, 18414, 18810, 19437, 20088, 20460, 20520, 21204, 22572, 23560, 24552, 25080, 25110, 25916, 26505, 27621, 28215, 30690, 30780, 31806, 32395, 33480, 33858, 35340, 35640, 36828, 37620, 38874, 40920, 42408, 45144, 46035, 47709, 50220, 51832, 53010, 55242, 56430, 58311, 61380, 61560, 63612, 64790, 67716, 70680, 73656, 75240, 77748, 79515, 84645, 92070, 95418, 97185, 100440, 106020, 110484, 112860, 116622, 122760, 127224, 129580, 135432, 138105, 155496, 159030, 169290, 174933, 184140, 190836, 194370, 212040, 220968, 225720, 233244, 238545, 259160, 276210, 291555, 318060, 338580, 349866, 368280, 381672, 388740, 466488, 477090, 524799, 552420, 583110, 636120, 677160, 699732, 777480, 874665, 954180, 1049598, 1104840, 1166220, 1399464, 1749330, 1908360, 2099196, 2332440, 2623995, 3498660, 4198392, 5247990, 6997320, 10495980, 20991960]

約数ペア:

[(1, 20991960), (2, 10495980), (3, 6997320), (4, 5247990), (5, 4198392), (6, 3498660), (8, 2623995), (9, 2332440), (10, 2099196), (11, 1908360), (12, 1749330), (15, 1399464), (18, 1166220), (19, 1104840), (20, 1049598), (22, 954180), (24, 874665), (27, 777480), (30, 699732), (31, 677160), (33, 636120), (36, 583110), (38, 552420), (40, 524799), (44, 477090), (45, 466488), (54, 388740), (55, 381672), (57, 368280), (60, 349866), (62, 338580), (66, 318060), (72, 291555), (76, 276210), (81, 259160), (88, 238545), (90, 233244), (93, 225720), (95, 220968), (99, 212040), (108, 194370), (110, 190836), (114, 184140), (120, 174933), (124, 169290), (132, 159030), (135, 155496), (152, 138105), (155, 135432), (162, 129580), (165, 127224), (171, 122760), (180, 116622), (186, 112860), (190, 110484), (198, 106020), (209, 100440), (216, 97185), (220, 95418), (228, 92070), (248, 84645), (264, 79515), (270, 77748), (279, 75240), (285, 73656), (297, 70680), (310, 67716), (324, 64790), (330, 63612), (341, 61560), (342, 61380), (360, 58311), (372, 56430), (380, 55242), (396, 53010), (405, 51832), (418, 50220), (440, 47709), (456, 46035), (465, 45144), (495, 42408), (513, 40920), (540, 38874), (558, 37620), (570, 36828), (589, 35640), (594, 35340), (620, 33858), (627, 33480), (648, 32395), (660, 31806), (682, 30780), (684, 30690), (744, 28215), (760, 27621), (792, 26505), (810, 25916), (836, 25110), (837, 25080), (855, 24552), (891, 23560), (930, 22572), (990, 21204), (1023, 20520), (1026, 20460), (1045, 20088), (1080, 19437), (1116, 18810), (1140, 18414), (1178, 17820), (1188, 17670), (1240, 16929), (1254, 16740), (1320, 15903), (1364, 15390), (1368, 15345), (1395, 15048), (1485, 14136), (1539, 13640), (1620, 12958), (1672, 12555), (1674, 12540), (1705, 12312), (1710, 12276), (1767, 11880), (1782, 11780), (1860, 11286), (1881, 11160), (1980, 10602), (2046, 10260), (2052, 10230), (2090, 10044), (2232, 9405), (2280, 9207), (2356, 8910), (2376, 8835), (2508, 8370), (2511, 8360), (2565, 8184), (2728, 7695), (2790, 7524), (2945, 7128), (2970, 7068), (3069, 6840), (3078, 6820), (3135, 6696), (3240, 6479), (3348, 6270), (3410, 6156), (3420, 6138), (3534, 5940), (3564, 5890), (3720, 5643), (3762, 5580), (3960, 5301), (4092, 5130), (4104, 5115), (4180, 5022), (4185, 5016), (4455, 4712)]