20717984

素因数分解:

$2^5\times 7^2\times {\mathrm{73}}^1\times {\mathrm{181}}^1$

素因数の和:278

約数の個数: 72

約数和(自身を含む): 48363588

約数和(自身を除く): 27645604

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 73, 98, 112, 146, 181, 196, 224, 292, 362, 392, 511, 584, 724, 784, 1022, 1168, 1267, 1448, 1568, 2044, 2336, 2534, 2896, 3577, 4088, 5068, 5792, 7154, 8176, 8869, 10136, 13213, 14308, 16352, 17738, 20272, 26426, 28616, 35476, 40544, 52852, 57232, 70952, 92491, 105704, 114464, 141904, 184982, 211408, 283808, 369964, 422816, 647437, 739928, 1294874, 1479856, 2589748, 2959712, 5179496, 10358992, 20717984]

約数ペア:

[(1, 20717984), (2, 10358992), (4, 5179496), (7, 2959712), (8, 2589748), (14, 1479856), (16, 1294874), (28, 739928), (32, 647437), (49, 422816), (56, 369964), (73, 283808), (98, 211408), (112, 184982), (146, 141904), (181, 114464), (196, 105704), (224, 92491), (292, 70952), (362, 57232), (392, 52852), (511, 40544), (584, 35476), (724, 28616), (784, 26426), (1022, 20272), (1168, 17738), (1267, 16352), (1448, 14308), (1568, 13213), (2044, 10136), (2336, 8869), (2534, 8176), (2896, 7154), (3577, 5792), (4088, 5068)]