1280640

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:74

約数の個数: 128

約数和(自身を含む): 4406400

約数和(自身を除く): 3125760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 29, 30, 32, 40, 46, 48, 58, 60, 64, 69, 80, 87, 92, 96, 115, 116, 120, 128, 138, 145, 160, 174, 184, 192, 230, 232, 240, 276, 290, 320, 345, 348, 368, 384, 435, 460, 464, 480, 552, 580, 640, 667, 690, 696, 736, 870, 920, 928, 960, 1104, 1160, 1334, 1380, 1392, 1472, 1740, 1840, 1856, 1920, 2001, 2208, 2320, 2668, 2760, 2784, 2944, 3335, 3480, 3680, 3712, 4002, 4416, 4640, 5336, 5520, 5568, 6670, 6960, 7360, 8004, 8832, 9280, 10005, 10672, 11040, 11136, 13340, 13920, 14720, 16008, 18560, 20010, 21344, 22080, 26680, 27840, 32016, 40020, 42688, 44160, 53360, 55680, 64032, 80040, 85376, 106720, 128064, 160080, 213440, 256128, 320160, 426880, 640320, 1280640]

約数ペア:

[(1, 1280640), (2, 640320), (3, 426880), (4, 320160), (5, 256128), (6, 213440), (8, 160080), (10, 128064), (12, 106720), (15, 85376), (16, 80040), (20, 64032), (23, 55680), (24, 53360), (29, 44160), (30, 42688), (32, 40020), (40, 32016), (46, 27840), (48, 26680), (58, 22080), (60, 21344), (64, 20010), (69, 18560), (80, 16008), (87, 14720), (92, 13920), (96, 13340), (115, 11136), (116, 11040), (120, 10672), (128, 10005), (138, 9280), (145, 8832), (160, 8004), (174, 7360), (184, 6960), (192, 6670), (230, 5568), (232, 5520), (240, 5336), (276, 4640), (290, 4416), (320, 4002), (345, 3712), (348, 3680), (368, 3480), (384, 3335), (435, 2944), (460, 2784), (464, 2760), (480, 2668), (552, 2320), (580, 2208), (640, 2001), (667, 1920), (690, 1856), (696, 1840), (736, 1740), (870, 1472), (920, 1392), (928, 1380), (960, 1334), (1104, 1160)]