281720320

素因数分解:

$2^9\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:308

約数の個数: 160

約数和(自身を含む): 785664000

約数和(自身を除く): 503943680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 79, 80, 112, 128, 140, 158, 160, 199, 224, 256, 280, 316, 320, 395, 398, 448, 512, 553, 560, 632, 640, 790, 796, 896, 995, 1106, 1120, 1264, 1280, 1393, 1580, 1592, 1792, 1990, 2212, 2240, 2528, 2560, 2765, 2786, 3160, 3184, 3584, 3980, 4424, 4480, 5056, 5530, 5572, 6320, 6368, 6965, 7960, 8848, 8960, 10112, 11060, 11144, 12640, 12736, 13930, 15721, 15920, 17696, 17920, 20224, 22120, 22288, 25280, 25472, 27860, 31442, 31840, 35392, 40448, 44240, 44576, 50560, 50944, 55720, 62884, 63680, 70784, 78605, 88480, 89152, 101120, 101888, 110047, 111440, 125768, 127360, 141568, 157210, 176960, 178304, 202240, 220094, 222880, 251536, 254720, 283136, 314420, 353920, 356608, 440188, 445760, 503072, 509440, 550235, 628840, 707840, 713216, 880376, 891520, 1006144, 1100470, 1257680, 1415680, 1760752, 1783040, 2012288, 2200940, 2515360, 3521504, 3566080, 4024576, 4401880, 5030720, 7043008, 8049152, 8803760, 10061440, 14086016, 17607520, 20122880, 28172032, 35215040, 40245760, 56344064, 70430080, 140860160, 281720320]

約数ペア:

[(1, 281720320), (2, 140860160), (4, 70430080), (5, 56344064), (7, 40245760), (8, 35215040), (10, 28172032), (14, 20122880), (16, 17607520), (20, 14086016), (28, 10061440), (32, 8803760), (35, 8049152), (40, 7043008), (56, 5030720), (64, 4401880), (70, 4024576), (79, 3566080), (80, 3521504), (112, 2515360), (128, 2200940), (140, 2012288), (158, 1783040), (160, 1760752), (199, 1415680), (224, 1257680), (256, 1100470), (280, 1006144), (316, 891520), (320, 880376), (395, 713216), (398, 707840), (448, 628840), (512, 550235), (553, 509440), (560, 503072), (632, 445760), (640, 440188), (790, 356608), (796, 353920), (896, 314420), (995, 283136), (1106, 254720), (1120, 251536), (1264, 222880), (1280, 220094), (1393, 202240), (1580, 178304), (1592, 176960), (1792, 157210), (1990, 141568), (2212, 127360), (2240, 125768), (2528, 111440), (2560, 110047), (2765, 101888), (2786, 101120), (3160, 89152), (3184, 88480), (3584, 78605), (3980, 70784), (4424, 63680), (4480, 62884), (5056, 55720), (5530, 50944), (5572, 50560), (6320, 44576), (6368, 44240), (6965, 40448), (7960, 35392), (8848, 31840), (8960, 31442), (10112, 27860), (11060, 25472), (11144, 25280), (12640, 22288), (12736, 22120), (13930, 20224), (15721, 17920), (15920, 17696)]