19880280

素因数分解:

$2^3\times 3^2\times 5^1\times 7^4\times {\mathrm{23}}^1$

素因数の和:68

約数の個数: 240

約数和(自身を含む): 78652080

約数和(自身を除く): 58771800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 23, 24, 28, 30, 35, 36, 40, 42, 45, 46, 49, 56, 60, 63, 69, 70, 72, 84, 90, 92, 98, 105, 115, 120, 126, 138, 140, 147, 161, 168, 180, 184, 196, 207, 210, 230, 245, 252, 276, 280, 294, 315, 322, 343, 345, 360, 392, 414, 420, 441, 460, 483, 490, 504, 552, 588, 630, 644, 686, 690, 735, 805, 828, 840, 882, 920, 966, 980, 1029, 1035, 1127, 1176, 1260, 1288, 1372, 1380, 1449, 1470, 1610, 1656, 1715, 1764, 1932, 1960, 2058, 2070, 2205, 2254, 2401, 2415, 2520, 2744, 2760, 2898, 2940, 3087, 3220, 3381, 3430, 3528, 3864, 4116, 4140, 4410, 4508, 4802, 4830, 5145, 5635, 5796, 5880, 6174, 6440, 6762, 6860, 7203, 7245, 7889, 8232, 8280, 8820, 9016, 9604, 9660, 10143, 10290, 11270, 11592, 12005, 12348, 13524, 13720, 14406, 14490, 15435, 15778, 16905, 17640, 19208, 19320, 20286, 20580, 21609, 22540, 23667, 24010, 24696, 27048, 28812, 28980, 30870, 31556, 33810, 36015, 39445, 40572, 41160, 43218, 45080, 47334, 48020, 50715, 55223, 57624, 57960, 61740, 63112, 67620, 71001, 72030, 78890, 81144, 86436, 94668, 96040, 101430, 108045, 110446, 118335, 123480, 135240, 142002, 144060, 157780, 165669, 172872, 189336, 202860, 216090, 220892, 236670, 276115, 284004, 288120, 315560, 331338, 355005, 405720, 432180, 441784, 473340, 497007, 552230, 568008, 662676, 710010, 828345, 864360, 946680, 994014, 1104460, 1325352, 1420020, 1656690, 1988028, 2208920, 2485035, 2840040, 3313380, 3976056, 4970070, 6626760, 9940140, 19880280]

約数ペア:

[(1, 19880280), (2, 9940140), (3, 6626760), (4, 4970070), (5, 3976056), (6, 3313380), (7, 2840040), (8, 2485035), (9, 2208920), (10, 1988028), (12, 1656690), (14, 1420020), (15, 1325352), (18, 1104460), (20, 994014), (21, 946680), (23, 864360), (24, 828345), (28, 710010), (30, 662676), (35, 568008), (36, 552230), (40, 497007), (42, 473340), (45, 441784), (46, 432180), (49, 405720), (56, 355005), (60, 331338), (63, 315560), (69, 288120), (70, 284004), (72, 276115), (84, 236670), (90, 220892), (92, 216090), (98, 202860), (105, 189336), (115, 172872), (120, 165669), (126, 157780), (138, 144060), (140, 142002), (147, 135240), (161, 123480), (168, 118335), (180, 110446), (184, 108045), (196, 101430), (207, 96040), (210, 94668), (230, 86436), (245, 81144), (252, 78890), (276, 72030), (280, 71001), (294, 67620), (315, 63112), (322, 61740), (343, 57960), (345, 57624), (360, 55223), (392, 50715), (414, 48020), (420, 47334), (441, 45080), (460, 43218), (483, 41160), (490, 40572), (504, 39445), (552, 36015), (588, 33810), (630, 31556), (644, 30870), (686, 28980), (690, 28812), (735, 27048), (805, 24696), (828, 24010), (840, 23667), (882, 22540), (920, 21609), (966, 20580), (980, 20286), (1029, 19320), (1035, 19208), (1127, 17640), (1176, 16905), (1260, 15778), (1288, 15435), (1372, 14490), (1380, 14406), (1449, 13720), (1470, 13524), (1610, 12348), (1656, 12005), (1715, 11592), (1764, 11270), (1932, 10290), (1960, 10143), (2058, 9660), (2070, 9604), (2205, 9016), (2254, 8820), (2401, 8280), (2415, 8232), (2520, 7889), (2744, 7245), (2760, 7203), (2898, 6860), (2940, 6762), (3087, 6440), (3220, 6174), (3381, 5880), (3430, 5796), (3528, 5635), (3864, 5145), (4116, 4830), (4140, 4802), (4410, 4508)]