20987400

素因数分解:

$2^3\times 3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:308

約数の個数: 192

約数和(自身を含む): 78566400

約数和(自身を除く): 57579000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 19, 20, 21, 24, 25, 28, 30, 35, 38, 40, 42, 50, 56, 57, 60, 70, 75, 76, 84, 95, 100, 105, 114, 120, 133, 140, 150, 152, 168, 175, 190, 200, 210, 228, 263, 266, 280, 285, 300, 350, 380, 399, 420, 456, 475, 525, 526, 532, 570, 600, 665, 700, 760, 789, 798, 840, 950, 1050, 1052, 1064, 1140, 1315, 1330, 1400, 1425, 1578, 1596, 1841, 1900, 1995, 2100, 2104, 2280, 2630, 2660, 2850, 3156, 3192, 3325, 3682, 3800, 3945, 3990, 4200, 4997, 5260, 5320, 5523, 5700, 6312, 6575, 6650, 7364, 7890, 7980, 9205, 9975, 9994, 10520, 11046, 11400, 13150, 13300, 14728, 14991, 15780, 15960, 18410, 19725, 19950, 19988, 22092, 24985, 26300, 26600, 27615, 29982, 31560, 34979, 36820, 39450, 39900, 39976, 44184, 46025, 49970, 52600, 55230, 59964, 69958, 73640, 74955, 78900, 79800, 92050, 99940, 104937, 110460, 119928, 124925, 138075, 139916, 149910, 157800, 174895, 184100, 199880, 209874, 220920, 249850, 276150, 279832, 299820, 349790, 368200, 374775, 419748, 499700, 524685, 552300, 599640, 699580, 749550, 839496, 874475, 999400, 1049370, 1104600, 1399160, 1499100, 1748950, 2098740, 2623425, 2998200, 3497900, 4197480, 5246850, 6995800, 10493700, 20987400]

約数ペア:

[(1, 20987400), (2, 10493700), (3, 6995800), (4, 5246850), (5, 4197480), (6, 3497900), (7, 2998200), (8, 2623425), (10, 2098740), (12, 1748950), (14, 1499100), (15, 1399160), (19, 1104600), (20, 1049370), (21, 999400), (24, 874475), (25, 839496), (28, 749550), (30, 699580), (35, 599640), (38, 552300), (40, 524685), (42, 499700), (50, 419748), (56, 374775), (57, 368200), (60, 349790), (70, 299820), (75, 279832), (76, 276150), (84, 249850), (95, 220920), (100, 209874), (105, 199880), (114, 184100), (120, 174895), (133, 157800), (140, 149910), (150, 139916), (152, 138075), (168, 124925), (175, 119928), (190, 110460), (200, 104937), (210, 99940), (228, 92050), (263, 79800), (266, 78900), (280, 74955), (285, 73640), (300, 69958), (350, 59964), (380, 55230), (399, 52600), (420, 49970), (456, 46025), (475, 44184), (525, 39976), (526, 39900), (532, 39450), (570, 36820), (600, 34979), (665, 31560), (700, 29982), (760, 27615), (789, 26600), (798, 26300), (840, 24985), (950, 22092), (1050, 19988), (1052, 19950), (1064, 19725), (1140, 18410), (1315, 15960), (1330, 15780), (1400, 14991), (1425, 14728), (1578, 13300), (1596, 13150), (1841, 11400), (1900, 11046), (1995, 10520), (2100, 9994), (2104, 9975), (2280, 9205), (2630, 7980), (2660, 7890), (2850, 7364), (3156, 6650), (3192, 6575), (3325, 6312), (3682, 5700), (3800, 5523), (3945, 5320), (3990, 5260), (4200, 4997)]