28381808

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{193}}^1$

素因数の和:322

約数の個数: 80

約数和(自身を含む): 68703936

約数和(自身を除く): 40322128

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 91, 101, 104, 112, 182, 193, 202, 208, 364, 386, 404, 707, 728, 772, 808, 1313, 1351, 1414, 1456, 1544, 1616, 2509, 2626, 2702, 2828, 3088, 5018, 5252, 5404, 5656, 9191, 10036, 10504, 10808, 11312, 17563, 18382, 19493, 20072, 21008, 21616, 35126, 36764, 38986, 40144, 70252, 73528, 77972, 136451, 140504, 147056, 155944, 253409, 272902, 281008, 311888, 506818, 545804, 1013636, 1091608, 1773863, 2027272, 2183216, 3547726, 4054544, 7095452, 14190904, 28381808]

約数ペア:

[(1, 28381808), (2, 14190904), (4, 7095452), (7, 4054544), (8, 3547726), (13, 2183216), (14, 2027272), (16, 1773863), (26, 1091608), (28, 1013636), (52, 545804), (56, 506818), (91, 311888), (101, 281008), (104, 272902), (112, 253409), (182, 155944), (193, 147056), (202, 140504), (208, 136451), (364, 77972), (386, 73528), (404, 70252), (707, 40144), (728, 38986), (772, 36764), (808, 35126), (1313, 21616), (1351, 21008), (1414, 20072), (1456, 19493), (1544, 18382), (1616, 17563), (2509, 11312), (2626, 10808), (2702, 10504), (2828, 10036), (3088, 9191), (5018, 5656), (5252, 5404)]