20481680

素因数分解:

$2^4\times 5^1\times {\mathrm{256021}}^1$

素因数の和:256034

約数の個数: 20

約数和(自身を含む): 47620092

約数和(自身を除く): 27138412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256021, 512042, 1024084, 1280105, 2048168, 2560210, 4096336, 5120420, 10240840, 20481680]

約数ペア:

[(1, 20481680), (2, 10240840), (4, 5120420), (5, 4096336), (8, 2560210), (10, 2048168), (16, 1280105), (20, 1024084), (40, 512042), (80, 256021)]