1998000000

素因数分解:

$2^7\times 3^3\times 5^6\times {\mathrm{37}}^1$

素因数の和:90

約数の個数: 448

約数和(自身を含む): 7570215600

約数和(自身を除く): 5572215600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36, 37, 40, 45, 48, 50, 54, 60, 64, 72, 74, 75, 80, 90, 96, 100, 108, 111, 120, 125, 128, 135, 144, 148, 150, 160, 180, 185, 192, 200, 216, 222, 225, 240, 250, 270, 288, 296, 300, 320, 333, 360, 370, 375, 384, 400, 432, 444, 450, 480, 500, 540, 555, 576, 592, 600, 625, 640, 666, 675, 720, 740, 750, 800, 864, 888, 900, 925, 960, 999, 1000, 1080, 1110, 1125, 1152, 1184, 1200, 1250, 1332, 1350, 1440, 1480, 1500, 1600, 1665, 1728, 1776, 1800, 1850, 1875, 1920, 1998, 2000, 2160, 2220, 2250, 2368, 2400, 2500, 2664, 2700, 2775, 2880, 2960, 3000, 3125, 3200, 3330, 3375, 3456, 3552, 3600, 3700, 3750, 3996, 4000, 4320, 4440, 4500, 4625, 4736, 4800, 4995, 5000, 5328, 5400, 5550, 5625, 5760, 5920, 6000, 6250, 6660, 6750, 7104, 7200, 7400, 7500, 7992, 8000, 8325, 8640, 8880, 9000, 9250, 9375, 9600, 9990, 10000, 10656, 10800, 11100, 11250, 11840, 12000, 12500, 13320, 13500, 13875, 14208, 14400, 14800, 15000, 15625, 15984, 16000, 16650, 16875, 17280, 17760, 18000, 18500, 18750, 19980, 20000, 21312, 21600, 22200, 22500, 23125, 23680, 24000, 24975, 25000, 26640, 27000, 27750, 28125, 28800, 29600, 30000, 31250, 31968, 33300, 33750, 35520, 36000, 37000, 37500, 39960, 40000, 41625, 42624, 43200, 44400, 45000, 46250, 46875, 48000, 49950, 50000, 53280, 54000, 55500, 56250, 59200, 60000, 62500, 63936, 66600, 67500, 69375, 71040, 72000, 74000, 75000, 79920, 80000, 83250, 84375, 86400, 88800, 90000, 92500, 93750, 99900, 100000, 106560, 108000, 111000, 112500, 115625, 118400, 120000, 124875, 125000, 127872, 133200, 135000, 138750, 140625, 144000, 148000, 150000, 159840, 166500, 168750, 177600, 180000, 185000, 187500, 199800, 200000, 208125, 213120, 216000, 222000, 225000, 231250, 240000, 249750, 250000, 266400, 270000, 277500, 281250, 296000, 300000, 319680, 333000, 337500, 346875, 355200, 360000, 370000, 375000, 399600, 400000, 416250, 421875, 432000, 444000, 450000, 462500, 499500, 500000, 532800, 540000, 555000, 562500, 578125, 592000, 600000, 624375, 639360, 666000, 675000, 693750, 720000, 740000, 750000, 799200, 832500, 843750, 888000, 900000, 925000, 999000, 1000000, 1040625, 1065600, 1080000, 1110000, 1125000, 1156250, 1200000, 1248750, 1332000, 1350000, 1387500, 1480000, 1500000, 1598400, 1665000, 1687500, 1734375, 1776000, 1800000, 1850000, 1998000, 2000000, 2081250, 2160000, 2220000, 2250000, 2312500, 2497500, 2664000, 2700000, 2775000, 2960000, 3000000, 3121875, 3196800, 3330000, 3375000, 3468750, 3600000, 3700000, 3996000, 4162500, 4440000, 4500000, 4625000, 4995000, 5203125, 5328000, 5400000, 5550000, 6000000, 6243750, 6660000, 6750000, 6937500, 7400000, 7992000, 8325000, 8880000, 9000000, 9250000, 9990000, 10406250, 10800000, 11100000, 12487500, 13320000, 13500000, 13875000, 14800000, 15609375, 15984000, 16650000, 18000000, 18500000, 19980000, 20812500, 22200000, 24975000, 26640000, 27000000, 27750000, 31218750, 33300000, 37000000, 39960000, 41625000, 44400000, 49950000, 54000000, 55500000, 62437500, 66600000, 74000000, 79920000, 83250000, 99900000, 111000000, 124875000, 133200000, 166500000, 199800000, 222000000, 249750000, 333000000, 399600000, 499500000, 666000000, 999000000, 1998000000]

約数ペア:

[(1, 1998000000), (2, 999000000), (3, 666000000), (4, 499500000), (5, 399600000), (6, 333000000), (8, 249750000), (9, 222000000), (10, 199800000), (12, 166500000), (15, 133200000), (16, 124875000), (18, 111000000), (20, 99900000), (24, 83250000), (25, 79920000), (27, 74000000), (30, 66600000), (32, 62437500), (36, 55500000), (37, 54000000), (40, 49950000), (45, 44400000), (48, 41625000), (50, 39960000), (54, 37000000), (60, 33300000), (64, 31218750), (72, 27750000), (74, 27000000), (75, 26640000), (80, 24975000), (90, 22200000), (96, 20812500), (100, 19980000), (108, 18500000), (111, 18000000), (120, 16650000), (125, 15984000), (128, 15609375), (135, 14800000), (144, 13875000), (148, 13500000), (150, 13320000), (160, 12487500), (180, 11100000), (185, 10800000), (192, 10406250), (200, 9990000), (216, 9250000), (222, 9000000), (225, 8880000), (240, 8325000), (250, 7992000), (270, 7400000), (288, 6937500), (296, 6750000), (300, 6660000), (320, 6243750), (333, 6000000), (360, 5550000), (370, 5400000), (375, 5328000), (384, 5203125), (400, 4995000), (432, 4625000), (444, 4500000), (450, 4440000), (480, 4162500), (500, 3996000), (540, 3700000), (555, 3600000), (576, 3468750), (592, 3375000), (600, 3330000), (625, 3196800), (640, 3121875), (666, 3000000), (675, 2960000), (720, 2775000), (740, 2700000), (750, 2664000), (800, 2497500), (864, 2312500), (888, 2250000), (900, 2220000), (925, 2160000), (960, 2081250), (999, 2000000), (1000, 1998000), (1080, 1850000), (1110, 1800000), (1125, 1776000), (1152, 1734375), (1184, 1687500), (1200, 1665000), (1250, 1598400), (1332, 1500000), (1350, 1480000), (1440, 1387500), (1480, 1350000), (1500, 1332000), (1600, 1248750), (1665, 1200000), (1728, 1156250), (1776, 1125000), (1800, 1110000), (1850, 1080000), (1875, 1065600), (1920, 1040625), (1998, 1000000), (2000, 999000), (2160, 925000), (2220, 900000), (2250, 888000), (2368, 843750), (2400, 832500), (2500, 799200), (2664, 750000), (2700, 740000), (2775, 720000), (2880, 693750), (2960, 675000), (3000, 666000), (3125, 639360), (3200, 624375), (3330, 600000), (3375, 592000), (3456, 578125), (3552, 562500), (3600, 555000), (3700, 540000), (3750, 532800), (3996, 500000), (4000, 499500), (4320, 462500), (4440, 450000), (4500, 444000), (4625, 432000), (4736, 421875), (4800, 416250), (4995, 400000), (5000, 399600), (5328, 375000), (5400, 370000), (5550, 360000), (5625, 355200), (5760, 346875), (5920, 337500), (6000, 333000), (6250, 319680), (6660, 300000), (6750, 296000), (7104, 281250), (7200, 277500), (7400, 270000), (7500, 266400), (7992, 250000), (8000, 249750), (8325, 240000), (8640, 231250), (8880, 225000), (9000, 222000), (9250, 216000), (9375, 213120), (9600, 208125), (9990, 200000), (10000, 199800), (10656, 187500), (10800, 185000), (11100, 180000), (11250, 177600), (11840, 168750), (12000, 166500), (12500, 159840), (13320, 150000), (13500, 148000), (13875, 144000), (14208, 140625), (14400, 138750), (14800, 135000), (15000, 133200), (15625, 127872), (15984, 125000), (16000, 124875), (16650, 120000), (16875, 118400), (17280, 115625), (17760, 112500), (18000, 111000), (18500, 108000), (18750, 106560), (19980, 100000), (20000, 99900), (21312, 93750), (21600, 92500), (22200, 90000), (22500, 88800), (23125, 86400), (23680, 84375), (24000, 83250), (24975, 80000), (25000, 79920), (26640, 75000), (27000, 74000), (27750, 72000), (28125, 71040), (28800, 69375), (29600, 67500), (30000, 66600), (31250, 63936), (31968, 62500), (33300, 60000), (33750, 59200), (35520, 56250), (36000, 55500), (37000, 54000), (37500, 53280), (39960, 50000), (40000, 49950), (41625, 48000), (42624, 46875), (43200, 46250), (44400, 45000)]