20704768

素因数分解:

$2^9\times 7^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 80

約数和(自身を含む): 48612960

約数和(自身を除く): 27908192

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 53, 56, 64, 106, 109, 112, 128, 212, 218, 224, 256, 371, 424, 436, 448, 512, 742, 763, 848, 872, 896, 1484, 1526, 1696, 1744, 1792, 2968, 3052, 3392, 3488, 3584, 5777, 5936, 6104, 6784, 6976, 11554, 11872, 12208, 13568, 13952, 23108, 23744, 24416, 27136, 27904, 40439, 46216, 47488, 48832, 55808, 80878, 92432, 94976, 97664, 161756, 184864, 189952, 195328, 323512, 369728, 390656, 647024, 739456, 1294048, 1478912, 2588096, 2957824, 5176192, 10352384, 20704768]

約数ペア:

[(1, 20704768), (2, 10352384), (4, 5176192), (7, 2957824), (8, 2588096), (14, 1478912), (16, 1294048), (28, 739456), (32, 647024), (53, 390656), (56, 369728), (64, 323512), (106, 195328), (109, 189952), (112, 184864), (128, 161756), (212, 97664), (218, 94976), (224, 92432), (256, 80878), (371, 55808), (424, 48832), (436, 47488), (448, 46216), (512, 40439), (742, 27904), (763, 27136), (848, 24416), (872, 23744), (896, 23108), (1484, 13952), (1526, 13568), (1696, 12208), (1744, 11872), (1792, 11554), (2968, 6976), (3052, 6784), (3392, 6104), (3488, 5936), (3584, 5777)]