28807240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:275

約数の個数: 128

約数和(自身を含む): 82944000

約数和(自身を除く): 54136760

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 47, 55, 56, 70, 77, 88, 94, 110, 140, 154, 188, 199, 220, 235, 280, 308, 329, 376, 385, 398, 440, 470, 517, 616, 658, 770, 796, 940, 995, 1034, 1316, 1393, 1540, 1592, 1645, 1880, 1990, 2068, 2189, 2585, 2632, 2786, 3080, 3290, 3619, 3980, 4136, 4378, 5170, 5572, 6580, 6965, 7238, 7960, 8756, 9353, 10340, 10945, 11144, 13160, 13930, 14476, 15323, 17512, 18095, 18706, 20680, 21890, 27860, 28952, 30646, 36190, 37412, 43780, 46765, 55720, 61292, 65471, 72380, 74824, 76615, 87560, 93530, 102883, 122584, 130942, 144760, 153230, 187060, 205766, 261884, 306460, 327355, 374120, 411532, 514415, 523768, 612920, 654710, 720181, 823064, 1028830, 1309420, 1440362, 2057660, 2618840, 2880724, 3600905, 4115320, 5761448, 7201810, 14403620, 28807240]

約数ペア:

[(1, 28807240), (2, 14403620), (4, 7201810), (5, 5761448), (7, 4115320), (8, 3600905), (10, 2880724), (11, 2618840), (14, 2057660), (20, 1440362), (22, 1309420), (28, 1028830), (35, 823064), (40, 720181), (44, 654710), (47, 612920), (55, 523768), (56, 514415), (70, 411532), (77, 374120), (88, 327355), (94, 306460), (110, 261884), (140, 205766), (154, 187060), (188, 153230), (199, 144760), (220, 130942), (235, 122584), (280, 102883), (308, 93530), (329, 87560), (376, 76615), (385, 74824), (398, 72380), (440, 65471), (470, 61292), (517, 55720), (616, 46765), (658, 43780), (770, 37412), (796, 36190), (940, 30646), (995, 28952), (1034, 27860), (1316, 21890), (1393, 20680), (1540, 18706), (1592, 18095), (1645, 17512), (1880, 15323), (1990, 14476), (2068, 13930), (2189, 13160), (2585, 11144), (2632, 10945), (2786, 10340), (3080, 9353), (3290, 8756), (3619, 7960), (3980, 7238), (4136, 6965), (4378, 6580), (5170, 5572)]