12820420

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1447}}^1$

素因数の和:1899

約数の個数: 24

約数和(自身を含む): 27002304

約数和(自身を除く): 14181884

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1447, 1772, 2215, 2894, 4430, 5788, 7235, 8860, 14470, 28940, 641021, 1282042, 2564084, 3205105, 6410210, 12820420]

約数ペア:

[(1, 12820420), (2, 6410210), (4, 3205105), (5, 2564084), (10, 1282042), (20, 641021), (443, 28940), (886, 14470), (1447, 8860), (1772, 7235), (2215, 5788), (2894, 4430)]