20491520

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{2287}}^1$

素因数の和:2315

約数の個数: 72

約数和(自身を含む): 56120064

約数和(自身を除く): 35628544

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 560, 640, 896, 1120, 1280, 1792, 2240, 2287, 4480, 4574, 8960, 9148, 11435, 16009, 18296, 22870, 32018, 36592, 45740, 64036, 73184, 80045, 91480, 128072, 146368, 160090, 182960, 256144, 292736, 320180, 365920, 512288, 585472, 640360, 731840, 1024576, 1280720, 1463680, 2049152, 2561440, 2927360, 4098304, 5122880, 10245760, 20491520]

約数ペア:

[(1, 20491520), (2, 10245760), (4, 5122880), (5, 4098304), (7, 2927360), (8, 2561440), (10, 2049152), (14, 1463680), (16, 1280720), (20, 1024576), (28, 731840), (32, 640360), (35, 585472), (40, 512288), (56, 365920), (64, 320180), (70, 292736), (80, 256144), (112, 182960), (128, 160090), (140, 146368), (160, 128072), (224, 91480), (256, 80045), (280, 73184), (320, 64036), (448, 45740), (560, 36592), (640, 32018), (896, 22870), (1120, 18296), (1280, 16009), (1792, 11435), (2240, 9148), (2287, 8960), (4480, 4574)]