21558240

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1361}}^1$

素因数の和:1393

約数の個数: 144

約数和(自身を含む): 80314416

約数和(自身を除く): 58756176

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 96, 99, 110, 120, 132, 144, 160, 165, 176, 180, 198, 220, 240, 264, 288, 330, 352, 360, 396, 440, 480, 495, 528, 660, 720, 792, 880, 990, 1056, 1320, 1361, 1440, 1584, 1760, 1980, 2640, 2722, 3168, 3960, 4083, 5280, 5444, 6805, 7920, 8166, 10888, 12249, 13610, 14971, 15840, 16332, 20415, 21776, 24498, 27220, 29942, 32664, 40830, 43552, 44913, 48996, 54440, 59884, 61245, 65328, 74855, 81660, 89826, 97992, 108880, 119768, 122490, 130656, 134739, 149710, 163320, 179652, 195984, 217760, 224565, 239536, 244980, 269478, 299420, 326640, 359304, 391968, 449130, 479072, 489960, 538956, 598840, 653280, 673695, 718608, 898260, 979920, 1077912, 1197680, 1347390, 1437216, 1796520, 1959840, 2155824, 2395360, 2694780, 3593040, 4311648, 5389560, 7186080, 10779120, 21558240]

約数ペア:

[(1, 21558240), (2, 10779120), (3, 7186080), (4, 5389560), (5, 4311648), (6, 3593040), (8, 2694780), (9, 2395360), (10, 2155824), (11, 1959840), (12, 1796520), (15, 1437216), (16, 1347390), (18, 1197680), (20, 1077912), (22, 979920), (24, 898260), (30, 718608), (32, 673695), (33, 653280), (36, 598840), (40, 538956), (44, 489960), (45, 479072), (48, 449130), (55, 391968), (60, 359304), (66, 326640), (72, 299420), (80, 269478), (88, 244980), (90, 239536), (96, 224565), (99, 217760), (110, 195984), (120, 179652), (132, 163320), (144, 149710), (160, 134739), (165, 130656), (176, 122490), (180, 119768), (198, 108880), (220, 97992), (240, 89826), (264, 81660), (288, 74855), (330, 65328), (352, 61245), (360, 59884), (396, 54440), (440, 48996), (480, 44913), (495, 43552), (528, 40830), (660, 32664), (720, 29942), (792, 27220), (880, 24498), (990, 21776), (1056, 20415), (1320, 16332), (1361, 15840), (1440, 14971), (1584, 13610), (1760, 12249), (1980, 10888), (2640, 8166), (2722, 7920), (3168, 6805), (3960, 5444), (4083, 5280)]