18990720

素因数分解:

$2^7\times 3^3\times 5^1\times 7^1\times {\mathrm{157}}^1$

素因数の和:192

約数の個数: 256

約数和(自身を含む): 77356800

約数和(自身を除く): 58366080

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 128, 135, 140, 144, 157, 160, 168, 180, 189, 192, 210, 216, 224, 240, 252, 270, 280, 288, 314, 315, 320, 336, 360, 378, 384, 420, 432, 448, 471, 480, 504, 540, 560, 576, 628, 630, 640, 672, 720, 756, 785, 840, 864, 896, 942, 945, 960, 1008, 1080, 1099, 1120, 1152, 1256, 1260, 1344, 1413, 1440, 1512, 1570, 1680, 1728, 1884, 1890, 1920, 2016, 2160, 2198, 2240, 2355, 2512, 2520, 2688, 2826, 2880, 3024, 3140, 3297, 3360, 3456, 3768, 3780, 4032, 4239, 4320, 4396, 4480, 4710, 5024, 5040, 5495, 5652, 5760, 6048, 6280, 6594, 6720, 7065, 7536, 7560, 8064, 8478, 8640, 8792, 9420, 9891, 10048, 10080, 10990, 11304, 12096, 12560, 13188, 13440, 14130, 15072, 15120, 16485, 16956, 17280, 17584, 18840, 19782, 20096, 20160, 21195, 21980, 22608, 24192, 25120, 26376, 28260, 29673, 30144, 30240, 32970, 33912, 35168, 37680, 39564, 40320, 42390, 43960, 45216, 49455, 50240, 52752, 56520, 59346, 60288, 60480, 65940, 67824, 70336, 75360, 79128, 84780, 87920, 90432, 98910, 100480, 105504, 113040, 118692, 120960, 131880, 135648, 140672, 148365, 150720, 158256, 169560, 175840, 180864, 197820, 211008, 226080, 237384, 263760, 271296, 296730, 301440, 316512, 339120, 351680, 395640, 422016, 452160, 474768, 527520, 542592, 593460, 633024, 678240, 703360, 791280, 904320, 949536, 1055040, 1186920, 1266048, 1356480, 1582560, 1899072, 2110080, 2373840, 2712960, 3165120, 3798144, 4747680, 6330240, 9495360, 18990720]

約数ペア:

[(1, 18990720), (2, 9495360), (3, 6330240), (4, 4747680), (5, 3798144), (6, 3165120), (7, 2712960), (8, 2373840), (9, 2110080), (10, 1899072), (12, 1582560), (14, 1356480), (15, 1266048), (16, 1186920), (18, 1055040), (20, 949536), (21, 904320), (24, 791280), (27, 703360), (28, 678240), (30, 633024), (32, 593460), (35, 542592), (36, 527520), (40, 474768), (42, 452160), (45, 422016), (48, 395640), (54, 351680), (56, 339120), (60, 316512), (63, 301440), (64, 296730), (70, 271296), (72, 263760), (80, 237384), (84, 226080), (90, 211008), (96, 197820), (105, 180864), (108, 175840), (112, 169560), (120, 158256), (126, 150720), (128, 148365), (135, 140672), (140, 135648), (144, 131880), (157, 120960), (160, 118692), (168, 113040), (180, 105504), (189, 100480), (192, 98910), (210, 90432), (216, 87920), (224, 84780), (240, 79128), (252, 75360), (270, 70336), (280, 67824), (288, 65940), (314, 60480), (315, 60288), (320, 59346), (336, 56520), (360, 52752), (378, 50240), (384, 49455), (420, 45216), (432, 43960), (448, 42390), (471, 40320), (480, 39564), (504, 37680), (540, 35168), (560, 33912), (576, 32970), (628, 30240), (630, 30144), (640, 29673), (672, 28260), (720, 26376), (756, 25120), (785, 24192), (840, 22608), (864, 21980), (896, 21195), (942, 20160), (945, 20096), (960, 19782), (1008, 18840), (1080, 17584), (1099, 17280), (1120, 16956), (1152, 16485), (1256, 15120), (1260, 15072), (1344, 14130), (1413, 13440), (1440, 13188), (1512, 12560), (1570, 12096), (1680, 11304), (1728, 10990), (1884, 10080), (1890, 10048), (1920, 9891), (2016, 9420), (2160, 8792), (2198, 8640), (2240, 8478), (2355, 8064), (2512, 7560), (2520, 7536), (2688, 7065), (2826, 6720), (2880, 6594), (3024, 6280), (3140, 6048), (3297, 5760), (3360, 5652), (3456, 5495), (3768, 5040), (3780, 5024), (4032, 4710), (4239, 4480), (4320, 4396)]