20510720

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2003}}^1$

素因数の和:2030

約数の個数: 48

約数和(自身を含む): 49238280

約数和(自身を除く): 28727560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2003, 2048, 2560, 4006, 5120, 8012, 10015, 10240, 16024, 20030, 32048, 40060, 64096, 80120, 128192, 160240, 256384, 320480, 512768, 640960, 1025536, 1281920, 2051072, 2563840, 4102144, 5127680, 10255360, 20510720]

約数ペア:

[(1, 20510720), (2, 10255360), (4, 5127680), (5, 4102144), (8, 2563840), (10, 2051072), (16, 1281920), (20, 1025536), (32, 640960), (40, 512768), (64, 320480), (80, 256384), (128, 160240), (160, 128192), (256, 80120), (320, 64096), (512, 40060), (640, 32048), (1024, 20030), (1280, 16024), (2003, 10240), (2048, 10015), (2560, 8012), (4006, 5120)]