20421979920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{399491}}^1$

素因数の和:399581

約数の個数: 120

約数和(自身を含む): 69549959232

約数和(自身を除く): 49127979312

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 71, 72, 80, 90, 120, 142, 144, 180, 213, 240, 284, 355, 360, 426, 568, 639, 710, 720, 852, 1065, 1136, 1278, 1420, 1704, 2130, 2556, 2840, 3195, 3408, 4260, 5112, 5680, 6390, 8520, 10224, 12780, 17040, 25560, 51120, 399491, 798982, 1198473, 1597964, 1997455, 2396946, 3195928, 3595419, 3994910, 4793892, 5992365, 6391856, 7190838, 7989820, 9587784, 11984730, 14381676, 15979640, 17977095, 19175568, 23969460, 28363861, 28763352, 31959280, 35954190, 47938920, 56727722, 57526704, 71908380, 85091583, 95877840, 113455444, 141819305, 143816760, 170183166, 226910888, 255274749, 283638610, 287633520, 340366332, 425457915, 453821776, 510549498, 567277220, 680732664, 850915830, 1021098996, 1134554440, 1276373745, 1361465328, 1701831660, 2042197992, 2269108880, 2552747490, 3403663320, 4084395984, 5105494980, 6807326640, 10210989960, 20421979920]

約数ペア:

[(1, 20421979920), (2, 10210989960), (3, 6807326640), (4, 5105494980), (5, 4084395984), (6, 3403663320), (8, 2552747490), (9, 2269108880), (10, 2042197992), (12, 1701831660), (15, 1361465328), (16, 1276373745), (18, 1134554440), (20, 1021098996), (24, 850915830), (30, 680732664), (36, 567277220), (40, 510549498), (45, 453821776), (48, 425457915), (60, 340366332), (71, 287633520), (72, 283638610), (80, 255274749), (90, 226910888), (120, 170183166), (142, 143816760), (144, 141819305), (180, 113455444), (213, 95877840), (240, 85091583), (284, 71908380), (355, 57526704), (360, 56727722), (426, 47938920), (568, 35954190), (639, 31959280), (710, 28763352), (720, 28363861), (852, 23969460), (1065, 19175568), (1136, 17977095), (1278, 15979640), (1420, 14381676), (1704, 11984730), (2130, 9587784), (2556, 7989820), (2840, 7190838), (3195, 6391856), (3408, 5992365), (4260, 4793892), (5112, 3994910), (5680, 3595419), (6390, 3195928), (8520, 2396946), (10224, 1997455), (12780, 1597964), (17040, 1198473), (25560, 798982), (51120, 399491)]