81221728

素因数分解:

$2^5\times 7^1\times {\mathrm{71}}^1\times {\mathrm{5107}}^1$

素因数の和:5195

約数の個数: 48

約数和(自身を含む): 185359104

約数和(自身を除く): 104137376

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 71, 112, 142, 224, 284, 497, 568, 994, 1136, 1988, 2272, 3976, 5107, 7952, 10214, 15904, 20428, 35749, 40856, 71498, 81712, 142996, 163424, 285992, 362597, 571984, 725194, 1143968, 1450388, 2538179, 2900776, 5076358, 5801552, 10152716, 11603104, 20305432, 40610864, 81221728]

約数ペア:

[(1, 81221728), (2, 40610864), (4, 20305432), (7, 11603104), (8, 10152716), (14, 5801552), (16, 5076358), (28, 2900776), (32, 2538179), (56, 1450388), (71, 1143968), (112, 725194), (142, 571984), (224, 362597), (284, 285992), (497, 163424), (568, 142996), (994, 81712), (1136, 71498), (1988, 40856), (2272, 35749), (3976, 20428), (5107, 15904), (7952, 10214)]