1280409120

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3187}}^1$

素因数の和:3245

約数の個数: 240

約数和(自身を含む): 4666007808

約数和(自身を除く): 3385598688

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 31, 32, 36, 40, 45, 48, 54, 60, 62, 72, 80, 81, 90, 93, 96, 108, 120, 124, 135, 144, 155, 160, 162, 180, 186, 216, 240, 248, 270, 279, 288, 310, 324, 360, 372, 405, 432, 465, 480, 496, 540, 558, 620, 648, 720, 744, 810, 837, 864, 930, 992, 1080, 1116, 1240, 1296, 1395, 1440, 1488, 1620, 1674, 1860, 2160, 2232, 2480, 2511, 2592, 2790, 2976, 3187, 3240, 3348, 3720, 4185, 4320, 4464, 4960, 5022, 5580, 6374, 6480, 6696, 7440, 8370, 8928, 9561, 10044, 11160, 12555, 12748, 12960, 13392, 14880, 15935, 16740, 19122, 20088, 22320, 25110, 25496, 26784, 28683, 31870, 33480, 38244, 40176, 44640, 47805, 50220, 50992, 57366, 63740, 66960, 76488, 80352, 86049, 95610, 98797, 100440, 101984, 114732, 127480, 133920, 143415, 152976, 172098, 191220, 197594, 200880, 229464, 254960, 258147, 286830, 296391, 305952, 344196, 382440, 395188, 401760, 430245, 458928, 493985, 509920, 516294, 573660, 592782, 688392, 764880, 790376, 860490, 889173, 917856, 987970, 1032588, 1147320, 1185564, 1290735, 1376784, 1481955, 1529760, 1580752, 1720980, 1778346, 1975940, 2065176, 2294640, 2371128, 2581470, 2667519, 2753568, 2963910, 3161504, 3441960, 3556692, 3951880, 4130352, 4445865, 4589280, 4742256, 5162940, 5335038, 5927820, 6883920, 7113384, 7903760, 8002557, 8260704, 8891730, 9484512, 10325880, 10670076, 11855640, 13337595, 13767840, 14226768, 15807520, 16005114, 17783460, 20651760, 21340152, 23711280, 26675190, 28453536, 32010228, 35566920, 40012785, 41303520, 42680304, 47422560, 53350380, 64020456, 71133840, 80025570, 85360608, 106700760, 128040912, 142267680, 160051140, 213401520, 256081824, 320102280, 426803040, 640204560, 1280409120]

約数ペア:

[(1, 1280409120), (2, 640204560), (3, 426803040), (4, 320102280), (5, 256081824), (6, 213401520), (8, 160051140), (9, 142267680), (10, 128040912), (12, 106700760), (15, 85360608), (16, 80025570), (18, 71133840), (20, 64020456), (24, 53350380), (27, 47422560), (30, 42680304), (31, 41303520), (32, 40012785), (36, 35566920), (40, 32010228), (45, 28453536), (48, 26675190), (54, 23711280), (60, 21340152), (62, 20651760), (72, 17783460), (80, 16005114), (81, 15807520), (90, 14226768), (93, 13767840), (96, 13337595), (108, 11855640), (120, 10670076), (124, 10325880), (135, 9484512), (144, 8891730), (155, 8260704), (160, 8002557), (162, 7903760), (180, 7113384), (186, 6883920), (216, 5927820), (240, 5335038), (248, 5162940), (270, 4742256), (279, 4589280), (288, 4445865), (310, 4130352), (324, 3951880), (360, 3556692), (372, 3441960), (405, 3161504), (432, 2963910), (465, 2753568), (480, 2667519), (496, 2581470), (540, 2371128), (558, 2294640), (620, 2065176), (648, 1975940), (720, 1778346), (744, 1720980), (810, 1580752), (837, 1529760), (864, 1481955), (930, 1376784), (992, 1290735), (1080, 1185564), (1116, 1147320), (1240, 1032588), (1296, 987970), (1395, 917856), (1440, 889173), (1488, 860490), (1620, 790376), (1674, 764880), (1860, 688392), (2160, 592782), (2232, 573660), (2480, 516294), (2511, 509920), (2592, 493985), (2790, 458928), (2976, 430245), (3187, 401760), (3240, 395188), (3348, 382440), (3720, 344196), (4185, 305952), (4320, 296391), (4464, 286830), (4960, 258147), (5022, 254960), (5580, 229464), (6374, 200880), (6480, 197594), (6696, 191220), (7440, 172098), (8370, 152976), (8928, 143415), (9561, 133920), (10044, 127480), (11160, 114732), (12555, 101984), (12748, 100440), (12960, 98797), (13392, 95610), (14880, 86049), (15935, 80352), (16740, 76488), (19122, 66960), (20088, 63740), (22320, 57366), (25110, 50992), (25496, 50220), (26784, 47805), (28683, 44640), (31870, 40176), (33480, 38244)]