21640320

素因数分解:

$2^7\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2$

素因数の和:72

約数の個数: 288

約数和(自身を含む): 85487220

約数和(自身を除く): 63846900

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 17, 18, 20, 24, 26, 30, 32, 34, 36, 39, 40, 45, 48, 51, 52, 60, 64, 65, 68, 72, 78, 80, 85, 90, 96, 102, 104, 117, 120, 128, 130, 136, 144, 153, 156, 160, 170, 180, 192, 195, 204, 208, 221, 234, 240, 255, 260, 272, 288, 289, 306, 312, 320, 340, 360, 384, 390, 408, 416, 442, 468, 480, 510, 520, 544, 576, 578, 585, 612, 624, 640, 663, 680, 720, 765, 780, 816, 832, 867, 884, 936, 960, 1020, 1040, 1088, 1105, 1152, 1156, 1170, 1224, 1248, 1326, 1360, 1440, 1445, 1530, 1560, 1632, 1664, 1734, 1768, 1872, 1920, 1989, 2040, 2080, 2176, 2210, 2312, 2340, 2448, 2496, 2601, 2652, 2720, 2880, 2890, 3060, 3120, 3264, 3315, 3468, 3536, 3744, 3757, 3978, 4080, 4160, 4335, 4420, 4624, 4680, 4896, 4992, 5202, 5304, 5440, 5760, 5780, 6120, 6240, 6528, 6630, 6936, 7072, 7488, 7514, 7956, 8160, 8320, 8670, 8840, 9248, 9360, 9792, 9945, 10404, 10608, 10880, 11271, 11560, 12240, 12480, 13005, 13260, 13872, 14144, 14976, 15028, 15912, 16320, 17340, 17680, 18496, 18720, 18785, 19584, 19890, 20808, 21216, 22542, 23120, 24480, 24960, 26010, 26520, 27744, 28288, 30056, 31824, 32640, 33813, 34680, 35360, 36992, 37440, 37570, 39780, 41616, 42432, 45084, 46240, 48960, 52020, 53040, 55488, 56355, 60112, 63648, 67626, 69360, 70720, 74880, 75140, 79560, 83232, 84864, 90168, 92480, 97920, 104040, 106080, 110976, 112710, 120224, 127296, 135252, 138720, 141440, 150280, 159120, 166464, 169065, 180336, 184960, 208080, 212160, 225420, 240448, 254592, 270504, 277440, 300560, 318240, 332928, 338130, 360672, 416160, 424320, 450840, 480896, 541008, 554880, 601120, 636480, 676260, 721344, 832320, 901680, 1082016, 1202240, 1272960, 1352520, 1442688, 1664640, 1803360, 2164032, 2404480, 2705040, 3606720, 4328064, 5410080, 7213440, 10820160, 21640320]

約数ペア:

[(1, 21640320), (2, 10820160), (3, 7213440), (4, 5410080), (5, 4328064), (6, 3606720), (8, 2705040), (9, 2404480), (10, 2164032), (12, 1803360), (13, 1664640), (15, 1442688), (16, 1352520), (17, 1272960), (18, 1202240), (20, 1082016), (24, 901680), (26, 832320), (30, 721344), (32, 676260), (34, 636480), (36, 601120), (39, 554880), (40, 541008), (45, 480896), (48, 450840), (51, 424320), (52, 416160), (60, 360672), (64, 338130), (65, 332928), (68, 318240), (72, 300560), (78, 277440), (80, 270504), (85, 254592), (90, 240448), (96, 225420), (102, 212160), (104, 208080), (117, 184960), (120, 180336), (128, 169065), (130, 166464), (136, 159120), (144, 150280), (153, 141440), (156, 138720), (160, 135252), (170, 127296), (180, 120224), (192, 112710), (195, 110976), (204, 106080), (208, 104040), (221, 97920), (234, 92480), (240, 90168), (255, 84864), (260, 83232), (272, 79560), (288, 75140), (289, 74880), (306, 70720), (312, 69360), (320, 67626), (340, 63648), (360, 60112), (384, 56355), (390, 55488), (408, 53040), (416, 52020), (442, 48960), (468, 46240), (480, 45084), (510, 42432), (520, 41616), (544, 39780), (576, 37570), (578, 37440), (585, 36992), (612, 35360), (624, 34680), (640, 33813), (663, 32640), (680, 31824), (720, 30056), (765, 28288), (780, 27744), (816, 26520), (832, 26010), (867, 24960), (884, 24480), (936, 23120), (960, 22542), (1020, 21216), (1040, 20808), (1088, 19890), (1105, 19584), (1152, 18785), (1156, 18720), (1170, 18496), (1224, 17680), (1248, 17340), (1326, 16320), (1360, 15912), (1440, 15028), (1445, 14976), (1530, 14144), (1560, 13872), (1632, 13260), (1664, 13005), (1734, 12480), (1768, 12240), (1872, 11560), (1920, 11271), (1989, 10880), (2040, 10608), (2080, 10404), (2176, 9945), (2210, 9792), (2312, 9360), (2340, 9248), (2448, 8840), (2496, 8670), (2601, 8320), (2652, 8160), (2720, 7956), (2880, 7514), (2890, 7488), (3060, 7072), (3120, 6936), (3264, 6630), (3315, 6528), (3468, 6240), (3536, 6120), (3744, 5780), (3757, 5760), (3978, 5440), (4080, 5304), (4160, 5202), (4335, 4992), (4420, 4896), (4624, 4680)]