20991488

素因数分解:

$2^9\times 7^1\times {\mathrm{5857}}^1$

素因数の和:5882

約数の個数: 40

約数和(自身を含む): 47941872

約数和(自身を除く): 26950384

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1792, 3584, 5857, 11714, 23428, 40999, 46856, 81998, 93712, 163996, 187424, 327992, 374848, 655984, 749696, 1311968, 1499392, 2623936, 2998784, 5247872, 10495744, 20991488]

約数ペア:

[(1, 20991488), (2, 10495744), (4, 5247872), (7, 2998784), (8, 2623936), (14, 1499392), (16, 1311968), (28, 749696), (32, 655984), (56, 374848), (64, 327992), (112, 187424), (128, 163996), (224, 93712), (256, 81998), (448, 46856), (512, 40999), (896, 23428), (1792, 11714), (3584, 5857)]