20578560

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{233}}^1$

素因数の和:280

約数の個数: 144

約数和(自身を含む): 68874624

約数和(自身を除く): 48296064

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 32, 40, 46, 48, 60, 64, 69, 80, 92, 96, 115, 120, 128, 138, 160, 184, 192, 230, 233, 240, 256, 276, 320, 345, 368, 384, 460, 466, 480, 552, 640, 690, 699, 736, 768, 920, 932, 960, 1104, 1165, 1280, 1380, 1398, 1472, 1840, 1864, 1920, 2208, 2330, 2760, 2796, 2944, 3495, 3680, 3728, 3840, 4416, 4660, 5359, 5520, 5592, 5888, 6990, 7360, 7456, 8832, 9320, 10718, 11040, 11184, 13980, 14720, 14912, 16077, 17664, 18640, 21436, 22080, 22368, 26795, 27960, 29440, 29824, 32154, 37280, 42872, 44160, 44736, 53590, 55920, 59648, 64308, 74560, 80385, 85744, 88320, 89472, 107180, 111840, 128616, 149120, 160770, 171488, 178944, 214360, 223680, 257232, 298240, 321540, 342976, 428720, 447360, 514464, 643080, 685952, 857440, 894720, 1028928, 1286160, 1371904, 1714880, 2057856, 2572320, 3429760, 4115712, 5144640, 6859520, 10289280, 20578560]

約数ペア:

[(1, 20578560), (2, 10289280), (3, 6859520), (4, 5144640), (5, 4115712), (6, 3429760), (8, 2572320), (10, 2057856), (12, 1714880), (15, 1371904), (16, 1286160), (20, 1028928), (23, 894720), (24, 857440), (30, 685952), (32, 643080), (40, 514464), (46, 447360), (48, 428720), (60, 342976), (64, 321540), (69, 298240), (80, 257232), (92, 223680), (96, 214360), (115, 178944), (120, 171488), (128, 160770), (138, 149120), (160, 128616), (184, 111840), (192, 107180), (230, 89472), (233, 88320), (240, 85744), (256, 80385), (276, 74560), (320, 64308), (345, 59648), (368, 55920), (384, 53590), (460, 44736), (466, 44160), (480, 42872), (552, 37280), (640, 32154), (690, 29824), (699, 29440), (736, 27960), (768, 26795), (920, 22368), (932, 22080), (960, 21436), (1104, 18640), (1165, 17664), (1280, 16077), (1380, 14912), (1398, 14720), (1472, 13980), (1840, 11184), (1864, 11040), (1920, 10718), (2208, 9320), (2330, 8832), (2760, 7456), (2796, 7360), (2944, 6990), (3495, 5888), (3680, 5592), (3728, 5520), (3840, 5359), (4416, 4660)]