21978000

素因数分解:

$2^4\times 3^3\times 5^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1$

素因数の和:80

約数の個数: 320

約数和(自身を含む): 88208640

約数和(自身を除く): 66230640

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 25, 27, 30, 33, 36, 37, 40, 44, 45, 48, 50, 54, 55, 60, 66, 72, 74, 75, 80, 88, 90, 99, 100, 108, 110, 111, 120, 125, 132, 135, 144, 148, 150, 165, 176, 180, 185, 198, 200, 216, 220, 222, 225, 240, 250, 264, 270, 275, 296, 297, 300, 330, 333, 360, 370, 375, 396, 400, 407, 432, 440, 444, 450, 495, 500, 528, 540, 550, 555, 592, 594, 600, 660, 666, 675, 720, 740, 750, 792, 814, 825, 880, 888, 900, 925, 990, 999, 1000, 1080, 1100, 1110, 1125, 1188, 1200, 1221, 1320, 1332, 1350, 1375, 1480, 1485, 1500, 1584, 1628, 1650, 1665, 1776, 1800, 1850, 1980, 1998, 2000, 2035, 2160, 2200, 2220, 2250, 2376, 2442, 2475, 2640, 2664, 2700, 2750, 2775, 2960, 2970, 3000, 3256, 3300, 3330, 3375, 3600, 3663, 3700, 3960, 3996, 4070, 4125, 4400, 4440, 4500, 4625, 4752, 4884, 4950, 4995, 5328, 5400, 5500, 5550, 5940, 6000, 6105, 6512, 6600, 6660, 6750, 7326, 7400, 7425, 7920, 7992, 8140, 8250, 8325, 8880, 9000, 9250, 9768, 9900, 9990, 10175, 10800, 10989, 11000, 11100, 11880, 12210, 12375, 13200, 13320, 13500, 13875, 14652, 14800, 14850, 15984, 16280, 16500, 16650, 18000, 18315, 18500, 19536, 19800, 19980, 20350, 21978, 22000, 22200, 23760, 24420, 24750, 24975, 26640, 27000, 27750, 29304, 29700, 30525, 32560, 33000, 33300, 36630, 37000, 37125, 39600, 39960, 40700, 41625, 43956, 44400, 48840, 49500, 49950, 50875, 54000, 54945, 55500, 58608, 59400, 61050, 66000, 66600, 73260, 74000, 74250, 79920, 81400, 83250, 87912, 91575, 97680, 99000, 99900, 101750, 109890, 111000, 118800, 122100, 124875, 133200, 146520, 148500, 152625, 162800, 166500, 175824, 183150, 198000, 199800, 203500, 219780, 222000, 244200, 249750, 274725, 293040, 297000, 305250, 333000, 366300, 399600, 407000, 439560, 457875, 488400, 499500, 549450, 594000, 610500, 666000, 732600, 814000, 879120, 915750, 999000, 1098900, 1221000, 1373625, 1465200, 1831500, 1998000, 2197800, 2442000, 2747250, 3663000, 4395600, 5494500, 7326000, 10989000, 21978000]

約数ペア:

[(1, 21978000), (2, 10989000), (3, 7326000), (4, 5494500), (5, 4395600), (6, 3663000), (8, 2747250), (9, 2442000), (10, 2197800), (11, 1998000), (12, 1831500), (15, 1465200), (16, 1373625), (18, 1221000), (20, 1098900), (22, 999000), (24, 915750), (25, 879120), (27, 814000), (30, 732600), (33, 666000), (36, 610500), (37, 594000), (40, 549450), (44, 499500), (45, 488400), (48, 457875), (50, 439560), (54, 407000), (55, 399600), (60, 366300), (66, 333000), (72, 305250), (74, 297000), (75, 293040), (80, 274725), (88, 249750), (90, 244200), (99, 222000), (100, 219780), (108, 203500), (110, 199800), (111, 198000), (120, 183150), (125, 175824), (132, 166500), (135, 162800), (144, 152625), (148, 148500), (150, 146520), (165, 133200), (176, 124875), (180, 122100), (185, 118800), (198, 111000), (200, 109890), (216, 101750), (220, 99900), (222, 99000), (225, 97680), (240, 91575), (250, 87912), (264, 83250), (270, 81400), (275, 79920), (296, 74250), (297, 74000), (300, 73260), (330, 66600), (333, 66000), (360, 61050), (370, 59400), (375, 58608), (396, 55500), (400, 54945), (407, 54000), (432, 50875), (440, 49950), (444, 49500), (450, 48840), (495, 44400), (500, 43956), (528, 41625), (540, 40700), (550, 39960), (555, 39600), (592, 37125), (594, 37000), (600, 36630), (660, 33300), (666, 33000), (675, 32560), (720, 30525), (740, 29700), (750, 29304), (792, 27750), (814, 27000), (825, 26640), (880, 24975), (888, 24750), (900, 24420), (925, 23760), (990, 22200), (999, 22000), (1000, 21978), (1080, 20350), (1100, 19980), (1110, 19800), (1125, 19536), (1188, 18500), (1200, 18315), (1221, 18000), (1320, 16650), (1332, 16500), (1350, 16280), (1375, 15984), (1480, 14850), (1485, 14800), (1500, 14652), (1584, 13875), (1628, 13500), (1650, 13320), (1665, 13200), (1776, 12375), (1800, 12210), (1850, 11880), (1980, 11100), (1998, 11000), (2000, 10989), (2035, 10800), (2160, 10175), (2200, 9990), (2220, 9900), (2250, 9768), (2376, 9250), (2442, 9000), (2475, 8880), (2640, 8325), (2664, 8250), (2700, 8140), (2750, 7992), (2775, 7920), (2960, 7425), (2970, 7400), (3000, 7326), (3256, 6750), (3300, 6660), (3330, 6600), (3375, 6512), (3600, 6105), (3663, 6000), (3700, 5940), (3960, 5550), (3996, 5500), (4070, 5400), (4125, 5328), (4400, 4995), (4440, 4950), (4500, 4884), (4625, 4752)]