20513584

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{193}}^1$

素因数の和:294

約数の個数: 80

約数和(自身を含む): 49844032

約数和(自身を除く): 29330448

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 73, 91, 104, 112, 146, 182, 193, 208, 292, 364, 386, 511, 584, 728, 772, 949, 1022, 1168, 1351, 1456, 1544, 1898, 2044, 2509, 2702, 3088, 3796, 4088, 5018, 5404, 6643, 7592, 8176, 10036, 10808, 13286, 14089, 15184, 17563, 20072, 21616, 26572, 28178, 35126, 40144, 53144, 56356, 70252, 98623, 106288, 112712, 140504, 183157, 197246, 225424, 281008, 366314, 394492, 732628, 788984, 1282099, 1465256, 1577968, 2564198, 2930512, 5128396, 10256792, 20513584]

約数ペア:

[(1, 20513584), (2, 10256792), (4, 5128396), (7, 2930512), (8, 2564198), (13, 1577968), (14, 1465256), (16, 1282099), (26, 788984), (28, 732628), (52, 394492), (56, 366314), (73, 281008), (91, 225424), (104, 197246), (112, 183157), (146, 140504), (182, 112712), (193, 106288), (208, 98623), (292, 70252), (364, 56356), (386, 53144), (511, 40144), (584, 35126), (728, 28178), (772, 26572), (949, 21616), (1022, 20072), (1168, 17563), (1351, 15184), (1456, 14089), (1544, 13286), (1898, 10808), (2044, 10036), (2509, 8176), (2702, 7592), (3088, 6643), (3796, 5404), (4088, 5018)]