81281280

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{347}}^1$

素因数の和:432

約数の個数: 144

約数和(自身を含む): 264608064

約数和(自身を除く): 183326784

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 61, 64, 80, 96, 120, 122, 128, 160, 183, 192, 240, 244, 256, 305, 320, 347, 366, 384, 480, 488, 610, 640, 694, 732, 768, 915, 960, 976, 1041, 1220, 1280, 1388, 1464, 1735, 1830, 1920, 1952, 2082, 2440, 2776, 2928, 3470, 3660, 3840, 3904, 4164, 4880, 5205, 5552, 5856, 6940, 7320, 7808, 8328, 9760, 10410, 11104, 11712, 13880, 14640, 15616, 16656, 19520, 20820, 21167, 22208, 23424, 27760, 29280, 33312, 39040, 41640, 42334, 44416, 46848, 55520, 58560, 63501, 66624, 78080, 83280, 84668, 88832, 105835, 111040, 117120, 127002, 133248, 166560, 169336, 211670, 222080, 234240, 254004, 266496, 317505, 333120, 338672, 423340, 444160, 508008, 635010, 666240, 677344, 846680, 1016016, 1270020, 1332480, 1354688, 1693360, 2032032, 2540040, 2709376, 3386720, 4064064, 5080080, 5418752, 6773440, 8128128, 10160160, 13546880, 16256256, 20320320, 27093760, 40640640, 81281280]

約数ペア:

[(1, 81281280), (2, 40640640), (3, 27093760), (4, 20320320), (5, 16256256), (6, 13546880), (8, 10160160), (10, 8128128), (12, 6773440), (15, 5418752), (16, 5080080), (20, 4064064), (24, 3386720), (30, 2709376), (32, 2540040), (40, 2032032), (48, 1693360), (60, 1354688), (61, 1332480), (64, 1270020), (80, 1016016), (96, 846680), (120, 677344), (122, 666240), (128, 635010), (160, 508008), (183, 444160), (192, 423340), (240, 338672), (244, 333120), (256, 317505), (305, 266496), (320, 254004), (347, 234240), (366, 222080), (384, 211670), (480, 169336), (488, 166560), (610, 133248), (640, 127002), (694, 117120), (732, 111040), (768, 105835), (915, 88832), (960, 84668), (976, 83280), (1041, 78080), (1220, 66624), (1280, 63501), (1388, 58560), (1464, 55520), (1735, 46848), (1830, 44416), (1920, 42334), (1952, 41640), (2082, 39040), (2440, 33312), (2776, 29280), (2928, 27760), (3470, 23424), (3660, 22208), (3840, 21167), (3904, 20820), (4164, 19520), (4880, 16656), (5205, 15616), (5552, 14640), (5856, 13880), (6940, 11712), (7320, 11104), (7808, 10410), (8328, 9760)]