18981000

素因数分解:

$2^3\times 3^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{37}}^1$

素因数の和:86

約数の個数: 256

約数和(自身を含む): 71136000

約数和(自身を除く): 52155000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 25, 27, 30, 36, 37, 38, 40, 45, 50, 54, 57, 60, 72, 74, 75, 76, 90, 95, 100, 108, 111, 114, 120, 125, 135, 148, 150, 152, 171, 180, 185, 190, 200, 216, 222, 225, 228, 250, 270, 285, 296, 300, 333, 342, 360, 370, 375, 380, 444, 450, 456, 475, 500, 513, 540, 555, 570, 600, 666, 675, 684, 703, 740, 750, 760, 855, 888, 900, 925, 950, 999, 1000, 1026, 1080, 1110, 1125, 1140, 1332, 1350, 1368, 1406, 1425, 1480, 1500, 1665, 1710, 1800, 1850, 1900, 1998, 2052, 2109, 2220, 2250, 2280, 2375, 2565, 2664, 2700, 2775, 2812, 2850, 3000, 3330, 3375, 3420, 3515, 3700, 3800, 3996, 4104, 4218, 4275, 4440, 4500, 4625, 4750, 4995, 5130, 5400, 5550, 5624, 5700, 6327, 6660, 6750, 6840, 7030, 7125, 7400, 7992, 8325, 8436, 8550, 9000, 9250, 9500, 9990, 10260, 10545, 11100, 11400, 12654, 12825, 13320, 13500, 13875, 14060, 14250, 16650, 16872, 17100, 17575, 18500, 18981, 19000, 19980, 20520, 21090, 21375, 22200, 24975, 25308, 25650, 27000, 27750, 28120, 28500, 31635, 33300, 34200, 35150, 37000, 37962, 39960, 41625, 42180, 42750, 49950, 50616, 51300, 52725, 55500, 57000, 63270, 64125, 66600, 70300, 75924, 83250, 84360, 85500, 87875, 94905, 99900, 102600, 105450, 111000, 124875, 126540, 128250, 140600, 151848, 158175, 166500, 171000, 175750, 189810, 199800, 210900, 249750, 253080, 256500, 263625, 316350, 333000, 351500, 379620, 421800, 474525, 499500, 513000, 527250, 632700, 703000, 759240, 790875, 949050, 999000, 1054500, 1265400, 1581750, 1898100, 2109000, 2372625, 3163500, 3796200, 4745250, 6327000, 9490500, 18981000]

約数ペア:

[(1, 18981000), (2, 9490500), (3, 6327000), (4, 4745250), (5, 3796200), (6, 3163500), (8, 2372625), (9, 2109000), (10, 1898100), (12, 1581750), (15, 1265400), (18, 1054500), (19, 999000), (20, 949050), (24, 790875), (25, 759240), (27, 703000), (30, 632700), (36, 527250), (37, 513000), (38, 499500), (40, 474525), (45, 421800), (50, 379620), (54, 351500), (57, 333000), (60, 316350), (72, 263625), (74, 256500), (75, 253080), (76, 249750), (90, 210900), (95, 199800), (100, 189810), (108, 175750), (111, 171000), (114, 166500), (120, 158175), (125, 151848), (135, 140600), (148, 128250), (150, 126540), (152, 124875), (171, 111000), (180, 105450), (185, 102600), (190, 99900), (200, 94905), (216, 87875), (222, 85500), (225, 84360), (228, 83250), (250, 75924), (270, 70300), (285, 66600), (296, 64125), (300, 63270), (333, 57000), (342, 55500), (360, 52725), (370, 51300), (375, 50616), (380, 49950), (444, 42750), (450, 42180), (456, 41625), (475, 39960), (500, 37962), (513, 37000), (540, 35150), (555, 34200), (570, 33300), (600, 31635), (666, 28500), (675, 28120), (684, 27750), (703, 27000), (740, 25650), (750, 25308), (760, 24975), (855, 22200), (888, 21375), (900, 21090), (925, 20520), (950, 19980), (999, 19000), (1000, 18981), (1026, 18500), (1080, 17575), (1110, 17100), (1125, 16872), (1140, 16650), (1332, 14250), (1350, 14060), (1368, 13875), (1406, 13500), (1425, 13320), (1480, 12825), (1500, 12654), (1665, 11400), (1710, 11100), (1800, 10545), (1850, 10260), (1900, 9990), (1998, 9500), (2052, 9250), (2109, 9000), (2220, 8550), (2250, 8436), (2280, 8325), (2375, 7992), (2565, 7400), (2664, 7125), (2700, 7030), (2775, 6840), (2812, 6750), (2850, 6660), (3000, 6327), (3330, 5700), (3375, 5624), (3420, 5550), (3515, 5400), (3700, 5130), (3800, 4995), (3996, 4750), (4104, 4625), (4218, 4500), (4275, 4440)]