280421120

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:315

約数の個数: 216

約数和(自身を含む): 830469024

約数和(自身を除く): 550047904

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 49, 56, 64, 68, 70, 80, 85, 98, 112, 119, 128, 136, 140, 160, 170, 196, 224, 238, 245, 256, 263, 272, 280, 320, 340, 392, 448, 476, 490, 526, 544, 560, 595, 640, 680, 784, 833, 896, 952, 980, 1052, 1088, 1120, 1190, 1280, 1315, 1360, 1568, 1666, 1792, 1841, 1904, 1960, 2104, 2176, 2240, 2380, 2630, 2720, 3136, 3332, 3682, 3808, 3920, 4165, 4208, 4352, 4471, 4480, 4760, 5260, 5440, 6272, 6664, 7364, 7616, 7840, 8330, 8416, 8942, 8960, 9205, 9520, 10520, 10880, 12544, 12887, 13328, 14728, 15232, 15680, 16660, 16832, 17884, 18410, 19040, 21040, 21760, 22355, 25774, 26656, 29456, 30464, 31297, 31360, 33320, 33664, 35768, 36820, 38080, 42080, 44710, 51548, 53312, 58912, 62594, 62720, 64435, 66640, 67328, 71536, 73640, 76160, 84160, 89420, 103096, 106624, 117824, 125188, 128870, 133280, 143072, 147280, 152320, 156485, 168320, 178840, 206192, 213248, 219079, 235648, 250376, 257740, 266560, 286144, 294560, 312970, 336640, 357680, 412384, 438158, 471296, 500752, 515480, 533120, 572288, 589120, 625940, 715360, 824768, 876316, 1001504, 1030960, 1066240, 1095395, 1144576, 1178240, 1251880, 1430720, 1649536, 1752632, 2003008, 2061920, 2190790, 2356480, 2503760, 2861440, 3299072, 3505264, 4006016, 4123840, 4381580, 5007520, 5722880, 7010528, 8012032, 8247680, 8763160, 10015040, 14021056, 16495360, 17526320, 20030080, 28042112, 35052640, 40060160, 56084224, 70105280, 140210560, 280421120]

約数ペア:

[(1, 280421120), (2, 140210560), (4, 70105280), (5, 56084224), (7, 40060160), (8, 35052640), (10, 28042112), (14, 20030080), (16, 17526320), (17, 16495360), (20, 14021056), (28, 10015040), (32, 8763160), (34, 8247680), (35, 8012032), (40, 7010528), (49, 5722880), (56, 5007520), (64, 4381580), (68, 4123840), (70, 4006016), (80, 3505264), (85, 3299072), (98, 2861440), (112, 2503760), (119, 2356480), (128, 2190790), (136, 2061920), (140, 2003008), (160, 1752632), (170, 1649536), (196, 1430720), (224, 1251880), (238, 1178240), (245, 1144576), (256, 1095395), (263, 1066240), (272, 1030960), (280, 1001504), (320, 876316), (340, 824768), (392, 715360), (448, 625940), (476, 589120), (490, 572288), (526, 533120), (544, 515480), (560, 500752), (595, 471296), (640, 438158), (680, 412384), (784, 357680), (833, 336640), (896, 312970), (952, 294560), (980, 286144), (1052, 266560), (1088, 257740), (1120, 250376), (1190, 235648), (1280, 219079), (1315, 213248), (1360, 206192), (1568, 178840), (1666, 168320), (1792, 156485), (1841, 152320), (1904, 147280), (1960, 143072), (2104, 133280), (2176, 128870), (2240, 125188), (2380, 117824), (2630, 106624), (2720, 103096), (3136, 89420), (3332, 84160), (3682, 76160), (3808, 73640), (3920, 71536), (4165, 67328), (4208, 66640), (4352, 64435), (4471, 62720), (4480, 62594), (4760, 58912), (5260, 53312), (5440, 51548), (6272, 44710), (6664, 42080), (7364, 38080), (7616, 36820), (7840, 35768), (8330, 33664), (8416, 33320), (8942, 31360), (8960, 31297), (9205, 30464), (9520, 29456), (10520, 26656), (10880, 25774), (12544, 22355), (12887, 21760), (13328, 21040), (14728, 19040), (15232, 18410), (15680, 17884), (16660, 16832)]