20321280

素因数分解:

$2^{10}\times 3^4\times 5^1\times 7^2$

素因数の和:51

約数の個数: 330

約数和(自身を含む): 84708954

約数和(自身を除く): 64387674

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 54, 56, 60, 63, 64, 70, 72, 80, 81, 84, 90, 96, 98, 105, 108, 112, 120, 126, 128, 135, 140, 144, 147, 160, 162, 168, 180, 189, 192, 196, 210, 216, 224, 240, 245, 252, 256, 270, 280, 288, 294, 315, 320, 324, 336, 360, 378, 384, 392, 405, 420, 432, 441, 448, 480, 490, 504, 512, 540, 560, 567, 576, 588, 630, 640, 648, 672, 720, 735, 756, 768, 784, 810, 840, 864, 882, 896, 945, 960, 980, 1008, 1024, 1080, 1120, 1134, 1152, 1176, 1260, 1280, 1296, 1323, 1344, 1440, 1470, 1512, 1536, 1568, 1620, 1680, 1728, 1764, 1792, 1890, 1920, 1960, 2016, 2160, 2205, 2240, 2268, 2304, 2352, 2520, 2560, 2592, 2646, 2688, 2835, 2880, 2940, 3024, 3072, 3136, 3240, 3360, 3456, 3528, 3584, 3780, 3840, 3920, 3969, 4032, 4320, 4410, 4480, 4536, 4608, 4704, 5040, 5120, 5184, 5292, 5376, 5670, 5760, 5880, 6048, 6272, 6480, 6615, 6720, 6912, 7056, 7168, 7560, 7680, 7840, 7938, 8064, 8640, 8820, 8960, 9072, 9216, 9408, 10080, 10368, 10584, 10752, 11340, 11520, 11760, 12096, 12544, 12960, 13230, 13440, 13824, 14112, 15120, 15360, 15680, 15876, 16128, 17280, 17640, 17920, 18144, 18816, 19845, 20160, 20736, 21168, 21504, 22680, 23040, 23520, 24192, 25088, 25920, 26460, 26880, 27648, 28224, 30240, 31360, 31752, 32256, 34560, 35280, 35840, 36288, 37632, 39690, 40320, 41472, 42336, 45360, 46080, 47040, 48384, 50176, 51840, 52920, 53760, 56448, 60480, 62720, 63504, 64512, 69120, 70560, 72576, 75264, 79380, 80640, 82944, 84672, 90720, 94080, 96768, 103680, 105840, 107520, 112896, 120960, 125440, 127008, 138240, 141120, 145152, 150528, 158760, 161280, 169344, 181440, 188160, 193536, 207360, 211680, 225792, 241920, 250880, 254016, 282240, 290304, 317520, 322560, 338688, 362880, 376320, 414720, 423360, 451584, 483840, 508032, 564480, 580608, 635040, 677376, 725760, 752640, 846720, 967680, 1016064, 1128960, 1270080, 1354752, 1451520, 1693440, 2032128, 2257920, 2540160, 2903040, 3386880, 4064256, 5080320, 6773760, 10160640, 20321280]

約数ペア:

[(1, 20321280), (2, 10160640), (3, 6773760), (4, 5080320), (5, 4064256), (6, 3386880), (7, 2903040), (8, 2540160), (9, 2257920), (10, 2032128), (12, 1693440), (14, 1451520), (15, 1354752), (16, 1270080), (18, 1128960), (20, 1016064), (21, 967680), (24, 846720), (27, 752640), (28, 725760), (30, 677376), (32, 635040), (35, 580608), (36, 564480), (40, 508032), (42, 483840), (45, 451584), (48, 423360), (49, 414720), (54, 376320), (56, 362880), (60, 338688), (63, 322560), (64, 317520), (70, 290304), (72, 282240), (80, 254016), (81, 250880), (84, 241920), (90, 225792), (96, 211680), (98, 207360), (105, 193536), (108, 188160), (112, 181440), (120, 169344), (126, 161280), (128, 158760), (135, 150528), (140, 145152), (144, 141120), (147, 138240), (160, 127008), (162, 125440), (168, 120960), (180, 112896), (189, 107520), (192, 105840), (196, 103680), (210, 96768), (216, 94080), (224, 90720), (240, 84672), (245, 82944), (252, 80640), (256, 79380), (270, 75264), (280, 72576), (288, 70560), (294, 69120), (315, 64512), (320, 63504), (324, 62720), (336, 60480), (360, 56448), (378, 53760), (384, 52920), (392, 51840), (405, 50176), (420, 48384), (432, 47040), (441, 46080), (448, 45360), (480, 42336), (490, 41472), (504, 40320), (512, 39690), (540, 37632), (560, 36288), (567, 35840), (576, 35280), (588, 34560), (630, 32256), (640, 31752), (648, 31360), (672, 30240), (720, 28224), (735, 27648), (756, 26880), (768, 26460), (784, 25920), (810, 25088), (840, 24192), (864, 23520), (882, 23040), (896, 22680), (945, 21504), (960, 21168), (980, 20736), (1008, 20160), (1024, 19845), (1080, 18816), (1120, 18144), (1134, 17920), (1152, 17640), (1176, 17280), (1260, 16128), (1280, 15876), (1296, 15680), (1323, 15360), (1344, 15120), (1440, 14112), (1470, 13824), (1512, 13440), (1536, 13230), (1568, 12960), (1620, 12544), (1680, 12096), (1728, 11760), (1764, 11520), (1792, 11340), (1890, 10752), (1920, 10584), (1960, 10368), (2016, 10080), (2160, 9408), (2205, 9216), (2240, 9072), (2268, 8960), (2304, 8820), (2352, 8640), (2520, 8064), (2560, 7938), (2592, 7840), (2646, 7680), (2688, 7560), (2835, 7168), (2880, 7056), (2940, 6912), (3024, 6720), (3072, 6615), (3136, 6480), (3240, 6272), (3360, 6048), (3456, 5880), (3528, 5760), (3584, 5670), (3780, 5376), (3840, 5292), (3920, 5184), (3969, 5120), (4032, 5040), (4320, 4704), (4410, 4608), (4480, 4536)]