20481520

素因数分解:

$2^4\times 5^1\times {\mathrm{256019}}^1$

素因数の和:256032

約数の個数: 20

約数和(自身を含む): 47619720

約数和(自身を除く): 27138200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256019, 512038, 1024076, 1280095, 2048152, 2560190, 4096304, 5120380, 10240760, 20481520]

約数ペア:

[(1, 20481520), (2, 10240760), (4, 5120380), (5, 4096304), (8, 2560190), (10, 2048152), (16, 1280095), (20, 1024076), (40, 512038), (80, 256019)]