20478976

素因数分解:

$2^{10}\times 7^1\times {\mathrm{2857}}^1$

素因数の和:2884

約数の個数: 44

約数和(自身を含む): 46802608

約数和(自身を除く): 26323632

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1024, 1792, 2857, 3584, 5714, 7168, 11428, 19999, 22856, 39998, 45712, 79996, 91424, 159992, 182848, 319984, 365696, 639968, 731392, 1279936, 1462784, 2559872, 2925568, 5119744, 10239488, 20478976]

約数ペア:

[(1, 20478976), (2, 10239488), (4, 5119744), (7, 2925568), (8, 2559872), (14, 1462784), (16, 1279936), (28, 731392), (32, 639968), (56, 365696), (64, 319984), (112, 182848), (128, 159992), (224, 91424), (256, 79996), (448, 45712), (512, 39998), (896, 22856), (1024, 19999), (1792, 11428), (2857, 7168), (3584, 5714)]