20805760

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:126

約数の個数: 128

約数和(自身を含む): 55080000

約数和(自身を除く): 34274240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 32, 38, 40, 58, 59, 64, 76, 80, 95, 116, 118, 128, 145, 152, 160, 190, 232, 236, 290, 295, 304, 320, 380, 464, 472, 551, 580, 590, 608, 640, 760, 928, 944, 1102, 1121, 1160, 1180, 1216, 1520, 1711, 1856, 1888, 2204, 2242, 2320, 2360, 2432, 2755, 3040, 3422, 3712, 3776, 4408, 4484, 4640, 4720, 5510, 5605, 6080, 6844, 7552, 8555, 8816, 8968, 9280, 9440, 11020, 11210, 12160, 13688, 17110, 17632, 17936, 18560, 18880, 22040, 22420, 27376, 32509, 34220, 35264, 35872, 37760, 44080, 44840, 54752, 65018, 68440, 70528, 71744, 88160, 89680, 109504, 130036, 136880, 143488, 162545, 176320, 179360, 219008, 260072, 273760, 325090, 352640, 358720, 520144, 547520, 650180, 717440, 1040288, 1095040, 1300360, 2080576, 2600720, 4161152, 5201440, 10402880, 20805760]

約数ペア:

[(1, 20805760), (2, 10402880), (4, 5201440), (5, 4161152), (8, 2600720), (10, 2080576), (16, 1300360), (19, 1095040), (20, 1040288), (29, 717440), (32, 650180), (38, 547520), (40, 520144), (58, 358720), (59, 352640), (64, 325090), (76, 273760), (80, 260072), (95, 219008), (116, 179360), (118, 176320), (128, 162545), (145, 143488), (152, 136880), (160, 130036), (190, 109504), (232, 89680), (236, 88160), (290, 71744), (295, 70528), (304, 68440), (320, 65018), (380, 54752), (464, 44840), (472, 44080), (551, 37760), (580, 35872), (590, 35264), (608, 34220), (640, 32509), (760, 27376), (928, 22420), (944, 22040), (1102, 18880), (1121, 18560), (1160, 17936), (1180, 17632), (1216, 17110), (1520, 13688), (1711, 12160), (1856, 11210), (1888, 11020), (2204, 9440), (2242, 9280), (2320, 8968), (2360, 8816), (2432, 8555), (2755, 7552), (3040, 6844), (3422, 6080), (3712, 5605), (3776, 5510), (4408, 4720), (4484, 4640)]