21315840

素因数分解:

$2^8\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1$

素因数の和:105

約数の個数: 288

約数和(自身を含む): 85161216

約数和(自身を除く): 63845376

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 32, 35, 39, 40, 42, 48, 52, 56, 60, 61, 64, 65, 70, 78, 80, 84, 91, 96, 104, 105, 112, 120, 122, 128, 130, 140, 156, 160, 168, 182, 183, 192, 195, 208, 210, 224, 240, 244, 256, 260, 273, 280, 305, 312, 320, 336, 364, 366, 384, 390, 416, 420, 427, 448, 455, 480, 488, 520, 546, 560, 610, 624, 640, 672, 728, 732, 768, 780, 793, 832, 840, 854, 896, 910, 915, 960, 976, 1040, 1092, 1120, 1220, 1248, 1280, 1281, 1344, 1365, 1456, 1464, 1560, 1586, 1664, 1680, 1708, 1792, 1820, 1830, 1920, 1952, 2080, 2135, 2184, 2240, 2379, 2440, 2496, 2562, 2688, 2730, 2912, 2928, 3120, 3172, 3328, 3360, 3416, 3640, 3660, 3840, 3904, 3965, 4160, 4270, 4368, 4480, 4758, 4880, 4992, 5124, 5376, 5460, 5551, 5824, 5856, 6240, 6344, 6405, 6720, 6832, 7280, 7320, 7808, 7930, 8320, 8540, 8736, 8960, 9516, 9760, 9984, 10248, 10920, 11102, 11648, 11712, 11895, 12480, 12688, 12810, 13440, 13664, 14560, 14640, 15616, 15860, 16640, 16653, 17080, 17472, 19032, 19520, 20496, 21840, 22204, 23296, 23424, 23790, 24960, 25376, 25620, 26880, 27328, 27755, 29120, 29280, 31720, 33306, 34160, 34944, 38064, 39040, 40992, 43680, 44408, 46848, 47580, 49920, 50752, 51240, 54656, 55510, 58240, 58560, 63440, 66612, 68320, 69888, 76128, 78080, 81984, 83265, 87360, 88816, 95160, 101504, 102480, 109312, 111020, 116480, 117120, 126880, 133224, 136640, 152256, 163968, 166530, 174720, 177632, 190320, 203008, 204960, 222040, 234240, 253760, 266448, 273280, 304512, 327936, 333060, 349440, 355264, 380640, 409920, 444080, 507520, 532896, 546560, 609024, 666120, 710528, 761280, 819840, 888160, 1015040, 1065792, 1332240, 1421056, 1522560, 1639680, 1776320, 2131584, 2664480, 3045120, 3552640, 4263168, 5328960, 7105280, 10657920, 21315840]

約数ペア:

[(1, 21315840), (2, 10657920), (3, 7105280), (4, 5328960), (5, 4263168), (6, 3552640), (7, 3045120), (8, 2664480), (10, 2131584), (12, 1776320), (13, 1639680), (14, 1522560), (15, 1421056), (16, 1332240), (20, 1065792), (21, 1015040), (24, 888160), (26, 819840), (28, 761280), (30, 710528), (32, 666120), (35, 609024), (39, 546560), (40, 532896), (42, 507520), (48, 444080), (52, 409920), (56, 380640), (60, 355264), (61, 349440), (64, 333060), (65, 327936), (70, 304512), (78, 273280), (80, 266448), (84, 253760), (91, 234240), (96, 222040), (104, 204960), (105, 203008), (112, 190320), (120, 177632), (122, 174720), (128, 166530), (130, 163968), (140, 152256), (156, 136640), (160, 133224), (168, 126880), (182, 117120), (183, 116480), (192, 111020), (195, 109312), (208, 102480), (210, 101504), (224, 95160), (240, 88816), (244, 87360), (256, 83265), (260, 81984), (273, 78080), (280, 76128), (305, 69888), (312, 68320), (320, 66612), (336, 63440), (364, 58560), (366, 58240), (384, 55510), (390, 54656), (416, 51240), (420, 50752), (427, 49920), (448, 47580), (455, 46848), (480, 44408), (488, 43680), (520, 40992), (546, 39040), (560, 38064), (610, 34944), (624, 34160), (640, 33306), (672, 31720), (728, 29280), (732, 29120), (768, 27755), (780, 27328), (793, 26880), (832, 25620), (840, 25376), (854, 24960), (896, 23790), (910, 23424), (915, 23296), (960, 22204), (976, 21840), (1040, 20496), (1092, 19520), (1120, 19032), (1220, 17472), (1248, 17080), (1280, 16653), (1281, 16640), (1344, 15860), (1365, 15616), (1456, 14640), (1464, 14560), (1560, 13664), (1586, 13440), (1664, 12810), (1680, 12688), (1708, 12480), (1792, 11895), (1820, 11712), (1830, 11648), (1920, 11102), (1952, 10920), (2080, 10248), (2135, 9984), (2184, 9760), (2240, 9516), (2379, 8960), (2440, 8736), (2496, 8540), (2562, 8320), (2688, 7930), (2730, 7808), (2912, 7320), (2928, 7280), (3120, 6832), (3172, 6720), (3328, 6405), (3360, 6344), (3416, 6240), (3640, 5856), (3660, 5824), (3840, 5551), (3904, 5460), (3965, 5376), (4160, 5124), (4270, 4992), (4368, 4880), (4480, 4758)]