21506049920

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{191}}^1$

素因数の和:437

約数の個数: 256

約数和(自身を含む): 55837900800

約数和(自身を除く): 34331850880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 79, 80, 85, 128, 131, 136, 158, 160, 170, 191, 262, 272, 316, 320, 340, 382, 395, 524, 544, 632, 640, 655, 680, 764, 790, 955, 1048, 1088, 1264, 1310, 1343, 1360, 1528, 1580, 1910, 2096, 2176, 2227, 2528, 2620, 2686, 2720, 3056, 3160, 3247, 3820, 4192, 4454, 5056, 5240, 5372, 5440, 6112, 6320, 6494, 6715, 7640, 8384, 8908, 10112, 10349, 10480, 10744, 10880, 11135, 12224, 12640, 12988, 13430, 15089, 15280, 16235, 16768, 17816, 20698, 20960, 21488, 22270, 24448, 25021, 25280, 25976, 26860, 30178, 30560, 32470, 35632, 41396, 41920, 42976, 44540, 50042, 50560, 51745, 51952, 53720, 60356, 61120, 64940, 71264, 75445, 82792, 83840, 85952, 89080, 100084, 103490, 103904, 107440, 120712, 122240, 125105, 129880, 142528, 150890, 165584, 171904, 175933, 178160, 200168, 206980, 207808, 214880, 241424, 250210, 256513, 259760, 285056, 301780, 331168, 351866, 356320, 400336, 413960, 415616, 425357, 429760, 482848, 500420, 513026, 519520, 603560, 662336, 703732, 712640, 800672, 827920, 850714, 859520, 879665, 965696, 1000840, 1026052, 1039040, 1207120, 1282565, 1324672, 1407464, 1425280, 1601344, 1655840, 1701428, 1759330, 1931392, 1976659, 2001680, 2052104, 2078080, 2126785, 2414240, 2565130, 2814928, 3202688, 3311680, 3402856, 3518660, 3953318, 4003360, 4104208, 4253570, 4828480, 5130260, 5629856, 6623360, 6805712, 7037320, 7906636, 8006720, 8208416, 8507140, 9656960, 9883295, 10260520, 11259712, 13611424, 14074640, 15813272, 16013440, 16416832, 17014280, 19766590, 20521040, 22519424, 27222848, 28149280, 31626544, 32833664, 33603203, 34028560, 39533180, 41042080, 54445696, 56298560, 63253088, 67206406, 68057120, 79066360, 82084160, 112597120, 126506176, 134412812, 136114240, 158132720, 164168320, 168016015, 253012352, 268825624, 272228480, 316265440, 336032030, 537651248, 632530880, 672064060, 1075302496, 1265061760, 1344128120, 2150604992, 2688256240, 4301209984, 5376512480, 10753024960, 21506049920]

約数ペア:

[(1, 21506049920), (2, 10753024960), (4, 5376512480), (5, 4301209984), (8, 2688256240), (10, 2150604992), (16, 1344128120), (17, 1265061760), (20, 1075302496), (32, 672064060), (34, 632530880), (40, 537651248), (64, 336032030), (68, 316265440), (79, 272228480), (80, 268825624), (85, 253012352), (128, 168016015), (131, 164168320), (136, 158132720), (158, 136114240), (160, 134412812), (170, 126506176), (191, 112597120), (262, 82084160), (272, 79066360), (316, 68057120), (320, 67206406), (340, 63253088), (382, 56298560), (395, 54445696), (524, 41042080), (544, 39533180), (632, 34028560), (640, 33603203), (655, 32833664), (680, 31626544), (764, 28149280), (790, 27222848), (955, 22519424), (1048, 20521040), (1088, 19766590), (1264, 17014280), (1310, 16416832), (1343, 16013440), (1360, 15813272), (1528, 14074640), (1580, 13611424), (1910, 11259712), (2096, 10260520), (2176, 9883295), (2227, 9656960), (2528, 8507140), (2620, 8208416), (2686, 8006720), (2720, 7906636), (3056, 7037320), (3160, 6805712), (3247, 6623360), (3820, 5629856), (4192, 5130260), (4454, 4828480), (5056, 4253570), (5240, 4104208), (5372, 4003360), (5440, 3953318), (6112, 3518660), (6320, 3402856), (6494, 3311680), (6715, 3202688), (7640, 2814928), (8384, 2565130), (8908, 2414240), (10112, 2126785), (10349, 2078080), (10480, 2052104), (10744, 2001680), (10880, 1976659), (11135, 1931392), (12224, 1759330), (12640, 1701428), (12988, 1655840), (13430, 1601344), (15089, 1425280), (15280, 1407464), (16235, 1324672), (16768, 1282565), (17816, 1207120), (20698, 1039040), (20960, 1026052), (21488, 1000840), (22270, 965696), (24448, 879665), (25021, 859520), (25280, 850714), (25976, 827920), (26860, 800672), (30178, 712640), (30560, 703732), (32470, 662336), (35632, 603560), (41396, 519520), (41920, 513026), (42976, 500420), (44540, 482848), (50042, 429760), (50560, 425357), (51745, 415616), (51952, 413960), (53720, 400336), (60356, 356320), (61120, 351866), (64940, 331168), (71264, 301780), (75445, 285056), (82792, 259760), (83840, 256513), (85952, 250210), (89080, 241424), (100084, 214880), (103490, 207808), (103904, 206980), (107440, 200168), (120712, 178160), (122240, 175933), (125105, 171904), (129880, 165584), (142528, 150890)]