19801600

素因数分解:

$2^9\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:65

約数の個数: 240

約数和(自身を含む): 63933408

約数和(自身を除く): 44131808

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 17, 20, 25, 26, 28, 32, 34, 35, 40, 50, 52, 56, 64, 65, 68, 70, 80, 85, 91, 100, 104, 112, 119, 128, 130, 136, 140, 160, 170, 175, 182, 200, 208, 221, 224, 238, 256, 260, 272, 280, 320, 325, 340, 350, 364, 400, 416, 425, 442, 448, 455, 476, 512, 520, 544, 560, 595, 640, 650, 680, 700, 728, 800, 832, 850, 884, 896, 910, 952, 1040, 1088, 1105, 1120, 1190, 1280, 1300, 1360, 1400, 1456, 1547, 1600, 1664, 1700, 1768, 1792, 1820, 1904, 2080, 2176, 2210, 2240, 2275, 2380, 2560, 2600, 2720, 2800, 2912, 2975, 3094, 3200, 3328, 3400, 3536, 3584, 3640, 3808, 4160, 4352, 4420, 4480, 4550, 4760, 5200, 5440, 5525, 5600, 5824, 5950, 6188, 6400, 6656, 6800, 7072, 7280, 7616, 7735, 8320, 8704, 8840, 8960, 9100, 9520, 10400, 10880, 11050, 11200, 11648, 11900, 12376, 12800, 13600, 14144, 14560, 15232, 15470, 16640, 17680, 17920, 18200, 19040, 20800, 21760, 22100, 22400, 23296, 23800, 24752, 27200, 28288, 29120, 30464, 30940, 33280, 35360, 36400, 38080, 38675, 41600, 43520, 44200, 44800, 46592, 47600, 49504, 54400, 56576, 58240, 60928, 61880, 70720, 72800, 76160, 77350, 83200, 88400, 89600, 95200, 99008, 108800, 113152, 116480, 123760, 141440, 145600, 152320, 154700, 166400, 176800, 190400, 198016, 217600, 232960, 247520, 282880, 291200, 304640, 309400, 353600, 380800, 396032, 495040, 565760, 582400, 618800, 707200, 761600, 792064, 990080, 1164800, 1237600, 1414400, 1523200, 1980160, 2475200, 2828800, 3960320, 4950400, 9900800, 19801600]

約数ペア:

[(1, 19801600), (2, 9900800), (4, 4950400), (5, 3960320), (7, 2828800), (8, 2475200), (10, 1980160), (13, 1523200), (14, 1414400), (16, 1237600), (17, 1164800), (20, 990080), (25, 792064), (26, 761600), (28, 707200), (32, 618800), (34, 582400), (35, 565760), (40, 495040), (50, 396032), (52, 380800), (56, 353600), (64, 309400), (65, 304640), (68, 291200), (70, 282880), (80, 247520), (85, 232960), (91, 217600), (100, 198016), (104, 190400), (112, 176800), (119, 166400), (128, 154700), (130, 152320), (136, 145600), (140, 141440), (160, 123760), (170, 116480), (175, 113152), (182, 108800), (200, 99008), (208, 95200), (221, 89600), (224, 88400), (238, 83200), (256, 77350), (260, 76160), (272, 72800), (280, 70720), (320, 61880), (325, 60928), (340, 58240), (350, 56576), (364, 54400), (400, 49504), (416, 47600), (425, 46592), (442, 44800), (448, 44200), (455, 43520), (476, 41600), (512, 38675), (520, 38080), (544, 36400), (560, 35360), (595, 33280), (640, 30940), (650, 30464), (680, 29120), (700, 28288), (728, 27200), (800, 24752), (832, 23800), (850, 23296), (884, 22400), (896, 22100), (910, 21760), (952, 20800), (1040, 19040), (1088, 18200), (1105, 17920), (1120, 17680), (1190, 16640), (1280, 15470), (1300, 15232), (1360, 14560), (1400, 14144), (1456, 13600), (1547, 12800), (1600, 12376), (1664, 11900), (1700, 11648), (1768, 11200), (1792, 11050), (1820, 10880), (1904, 10400), (2080, 9520), (2176, 9100), (2210, 8960), (2240, 8840), (2275, 8704), (2380, 8320), (2560, 7735), (2600, 7616), (2720, 7280), (2800, 7072), (2912, 6800), (2975, 6656), (3094, 6400), (3200, 6188), (3328, 5950), (3400, 5824), (3536, 5600), (3584, 5525), (3640, 5440), (3808, 5200), (4160, 4760), (4352, 4550), (4420, 4480)]