19885680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:479

約数の個数: 120

約数和(自身を含む): 67897440

約数和(自身を除く): 48011760

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, 389, 426, 568, 639, 710, 720, 778, 852, 1065, 1136, 1167, 1278, 1420, 1556, 1704, 1945, 2130, 2334, 2556, 2840, 3112, 3195, 3408, 3501, 3890, 4260, 4668, 5112, 5680, 5835, 6224, 6390, 7002, 7780, 8520, 9336, 10224, 11670, 12780, 14004, 15560, 17040, 17505, 18672, 23340, 25560, 27619, 28008, 31120, 35010, 46680, 51120, 55238, 56016, 70020, 82857, 93360, 110476, 138095, 140040, 165714, 220952, 248571, 276190, 280080, 331428, 414285, 441904, 497142, 552380, 662856, 828570, 994284, 1104760, 1242855, 1325712, 1657140, 1988568, 2209520, 2485710, 3314280, 3977136, 4971420, 6628560, 9942840, 19885680]

約数ペア:

[(1, 19885680), (2, 9942840), (3, 6628560), (4, 4971420), (5, 3977136), (6, 3314280), (8, 2485710), (9, 2209520), (10, 1988568), (12, 1657140), (15, 1325712), (16, 1242855), (18, 1104760), (20, 994284), (24, 828570), (30, 662856), (36, 552380), (40, 497142), (45, 441904), (48, 414285), (60, 331428), (71, 280080), (72, 276190), (80, 248571), (90, 220952), (120, 165714), (142, 140040), (144, 138095), (180, 110476), (213, 93360), (240, 82857), (284, 70020), (355, 56016), (360, 55238), (389, 51120), (426, 46680), (568, 35010), (639, 31120), (710, 28008), (720, 27619), (778, 25560), (852, 23340), (1065, 18672), (1136, 17505), (1167, 17040), (1278, 15560), (1420, 14004), (1556, 12780), (1704, 11670), (1945, 10224), (2130, 9336), (2334, 8520), (2556, 7780), (2840, 7002), (3112, 6390), (3195, 6224), (3408, 5835), (3501, 5680), (3890, 5112), (4260, 4668)]