20503040

素因数分解:

$2^9\times 5^1\times {\mathrm{8009}}^1$

素因数の和:8032

約数の個数: 40

約数和(自身を含む): 49165380

約数和(自身を除く): 28662340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8009, 16018, 32036, 40045, 64072, 80090, 128144, 160180, 256288, 320360, 512576, 640720, 1025152, 1281440, 2050304, 2562880, 4100608, 5125760, 10251520, 20503040]

約数ペア:

[(1, 20503040), (2, 10251520), (4, 5125760), (5, 4100608), (8, 2562880), (10, 2050304), (16, 1281440), (20, 1025152), (32, 640720), (40, 512576), (64, 320360), (80, 256288), (128, 160180), (160, 128144), (256, 80090), (320, 64072), (512, 40045), (640, 32036), (1280, 16018), (2560, 8009)]