28807680

素因数分解:

$2^9\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1$

素因数の和:79

約数の個数: 240

約数和(自身を含む): 104493312

約数和(自身を除く): 75685632

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 31, 32, 33, 40, 44, 48, 55, 60, 62, 64, 66, 80, 88, 93, 96, 110, 120, 121, 124, 128, 132, 155, 160, 165, 176, 186, 192, 220, 240, 242, 248, 256, 264, 310, 320, 330, 341, 352, 363, 372, 384, 440, 465, 480, 484, 496, 512, 528, 605, 620, 640, 660, 682, 704, 726, 744, 768, 880, 930, 960, 968, 992, 1023, 1056, 1210, 1240, 1280, 1320, 1364, 1408, 1452, 1488, 1536, 1705, 1760, 1815, 1860, 1920, 1936, 1984, 2046, 2112, 2420, 2480, 2560, 2640, 2728, 2816, 2904, 2976, 3410, 3520, 3630, 3720, 3751, 3840, 3872, 3968, 4092, 4224, 4840, 4960, 5115, 5280, 5456, 5632, 5808, 5952, 6820, 7040, 7260, 7440, 7502, 7680, 7744, 7936, 8184, 8448, 9680, 9920, 10230, 10560, 10912, 11253, 11616, 11904, 13640, 14080, 14520, 14880, 15004, 15488, 15872, 16368, 16896, 18755, 19360, 19840, 20460, 21120, 21824, 22506, 23232, 23808, 27280, 28160, 29040, 29760, 30008, 30976, 32736, 37510, 38720, 39680, 40920, 42240, 43648, 45012, 46464, 47616, 54560, 56265, 58080, 59520, 60016, 61952, 65472, 75020, 77440, 79360, 81840, 84480, 87296, 90024, 92928, 109120, 112530, 116160, 119040, 120032, 130944, 150040, 154880, 163680, 174592, 180048, 185856, 218240, 225060, 232320, 238080, 240064, 261888, 300080, 309760, 327360, 360096, 436480, 450120, 464640, 480128, 523776, 600160, 654720, 720192, 872960, 900240, 929280, 960256, 1200320, 1309440, 1440384, 1800480, 1920512, 2400640, 2618880, 2880768, 3600960, 4801280, 5761536, 7201920, 9602560, 14403840, 28807680]

約数ペア:

[(1, 28807680), (2, 14403840), (3, 9602560), (4, 7201920), (5, 5761536), (6, 4801280), (8, 3600960), (10, 2880768), (11, 2618880), (12, 2400640), (15, 1920512), (16, 1800480), (20, 1440384), (22, 1309440), (24, 1200320), (30, 960256), (31, 929280), (32, 900240), (33, 872960), (40, 720192), (44, 654720), (48, 600160), (55, 523776), (60, 480128), (62, 464640), (64, 450120), (66, 436480), (80, 360096), (88, 327360), (93, 309760), (96, 300080), (110, 261888), (120, 240064), (121, 238080), (124, 232320), (128, 225060), (132, 218240), (155, 185856), (160, 180048), (165, 174592), (176, 163680), (186, 154880), (192, 150040), (220, 130944), (240, 120032), (242, 119040), (248, 116160), (256, 112530), (264, 109120), (310, 92928), (320, 90024), (330, 87296), (341, 84480), (352, 81840), (363, 79360), (372, 77440), (384, 75020), (440, 65472), (465, 61952), (480, 60016), (484, 59520), (496, 58080), (512, 56265), (528, 54560), (605, 47616), (620, 46464), (640, 45012), (660, 43648), (682, 42240), (704, 40920), (726, 39680), (744, 38720), (768, 37510), (880, 32736), (930, 30976), (960, 30008), (968, 29760), (992, 29040), (1023, 28160), (1056, 27280), (1210, 23808), (1240, 23232), (1280, 22506), (1320, 21824), (1364, 21120), (1408, 20460), (1452, 19840), (1488, 19360), (1536, 18755), (1705, 16896), (1760, 16368), (1815, 15872), (1860, 15488), (1920, 15004), (1936, 14880), (1984, 14520), (2046, 14080), (2112, 13640), (2420, 11904), (2480, 11616), (2560, 11253), (2640, 10912), (2728, 10560), (2816, 10230), (2904, 9920), (2976, 9680), (3410, 8448), (3520, 8184), (3630, 7936), (3720, 7744), (3751, 7680), (3840, 7502), (3872, 7440), (3968, 7260), (4092, 7040), (4224, 6820), (4840, 5952), (4960, 5808), (5115, 5632), (5280, 5456)]