128775920

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:85

約数の個数: 240

約数和(自身を含む): 396849600

約数和(自身を除く): 268073680

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 26, 28, 35, 38, 40, 49, 52, 56, 65, 70, 76, 80, 91, 95, 98, 104, 112, 130, 133, 140, 152, 182, 190, 196, 208, 245, 247, 260, 266, 280, 304, 343, 361, 364, 380, 392, 455, 490, 494, 520, 532, 560, 637, 665, 686, 722, 728, 760, 784, 910, 931, 980, 988, 1040, 1064, 1235, 1274, 1330, 1372, 1444, 1456, 1520, 1715, 1729, 1805, 1820, 1862, 1960, 1976, 2128, 2470, 2527, 2548, 2660, 2744, 2888, 3185, 3430, 3458, 3610, 3640, 3724, 3920, 3952, 4459, 4655, 4693, 4940, 5054, 5096, 5320, 5488, 5776, 6370, 6517, 6860, 6916, 7220, 7280, 7448, 8645, 8918, 9310, 9386, 9880, 10108, 10192, 10640, 12103, 12635, 12740, 13034, 13720, 13832, 14440, 14896, 17290, 17689, 17836, 18620, 18772, 19760, 20216, 22295, 23465, 24206, 25270, 25480, 26068, 27440, 27664, 28880, 32585, 32851, 34580, 35378, 35672, 37240, 37544, 40432, 44590, 46930, 48412, 50540, 50960, 52136, 60515, 65170, 65702, 69160, 70756, 71344, 74480, 75088, 84721, 88445, 89180, 93860, 96824, 101080, 104272, 121030, 123823, 130340, 131404, 138320, 141512, 164255, 169442, 176890, 178360, 187720, 193648, 202160, 229957, 242060, 247646, 260680, 262808, 283024, 328510, 338884, 353780, 356720, 375440, 423605, 459914, 484120, 495292, 521360, 525616, 619115, 657020, 677768, 707560, 847210, 919828, 968240, 990584, 1149785, 1238230, 1314040, 1355536, 1415120, 1609699, 1694420, 1839656, 1981168, 2299570, 2476460, 2628080, 3219398, 3388840, 3679312, 4599140, 4952920, 6438796, 6777680, 8048495, 9198280, 9905840, 12877592, 16096990, 18396560, 25755184, 32193980, 64387960, 128775920]

約数ペア:

[(1, 128775920), (2, 64387960), (4, 32193980), (5, 25755184), (7, 18396560), (8, 16096990), (10, 12877592), (13, 9905840), (14, 9198280), (16, 8048495), (19, 6777680), (20, 6438796), (26, 4952920), (28, 4599140), (35, 3679312), (38, 3388840), (40, 3219398), (49, 2628080), (52, 2476460), (56, 2299570), (65, 1981168), (70, 1839656), (76, 1694420), (80, 1609699), (91, 1415120), (95, 1355536), (98, 1314040), (104, 1238230), (112, 1149785), (130, 990584), (133, 968240), (140, 919828), (152, 847210), (182, 707560), (190, 677768), (196, 657020), (208, 619115), (245, 525616), (247, 521360), (260, 495292), (266, 484120), (280, 459914), (304, 423605), (343, 375440), (361, 356720), (364, 353780), (380, 338884), (392, 328510), (455, 283024), (490, 262808), (494, 260680), (520, 247646), (532, 242060), (560, 229957), (637, 202160), (665, 193648), (686, 187720), (722, 178360), (728, 176890), (760, 169442), (784, 164255), (910, 141512), (931, 138320), (980, 131404), (988, 130340), (1040, 123823), (1064, 121030), (1235, 104272), (1274, 101080), (1330, 96824), (1372, 93860), (1444, 89180), (1456, 88445), (1520, 84721), (1715, 75088), (1729, 74480), (1805, 71344), (1820, 70756), (1862, 69160), (1960, 65702), (1976, 65170), (2128, 60515), (2470, 52136), (2527, 50960), (2548, 50540), (2660, 48412), (2744, 46930), (2888, 44590), (3185, 40432), (3430, 37544), (3458, 37240), (3610, 35672), (3640, 35378), (3724, 34580), (3920, 32851), (3952, 32585), (4459, 28880), (4655, 27664), (4693, 27440), (4940, 26068), (5054, 25480), (5096, 25270), (5320, 24206), (5488, 23465), (5776, 22295), (6370, 20216), (6517, 19760), (6860, 18772), (6916, 18620), (7220, 17836), (7280, 17689), (7448, 17290), (8645, 14896), (8918, 14440), (9310, 13832), (9386, 13720), (9880, 13034), (10108, 12740), (10192, 12635), (10640, 12103)]