19917568

素因数分解:

$2^8\times {\mathrm{11}}^2\times {\mathrm{643}}^1$

素因数の和:681

約数の個数: 54

約数和(自身を含む): 43768172

約数和(自身を除く): 23850604

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 64, 88, 121, 128, 176, 242, 256, 352, 484, 643, 704, 968, 1286, 1408, 1936, 2572, 2816, 3872, 5144, 7073, 7744, 10288, 14146, 15488, 20576, 28292, 30976, 41152, 56584, 77803, 82304, 113168, 155606, 164608, 226336, 311212, 452672, 622424, 905344, 1244848, 1810688, 2489696, 4979392, 9958784, 19917568]

約数ペア:

[(1, 19917568), (2, 9958784), (4, 4979392), (8, 2489696), (11, 1810688), (16, 1244848), (22, 905344), (32, 622424), (44, 452672), (64, 311212), (88, 226336), (121, 164608), (128, 155606), (176, 113168), (242, 82304), (256, 77803), (352, 56584), (484, 41152), (643, 30976), (704, 28292), (968, 20576), (1286, 15488), (1408, 14146), (1936, 10288), (2572, 7744), (2816, 7073), (3872, 5144)]