20393900

素因数分解:

$2^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{1871}}^1$

素因数の和:1994

約数の個数: 36

約数和(自身を含む): 44684640

約数和(自身を除く): 24290740

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 218, 436, 545, 1090, 1871, 2180, 2725, 3742, 5450, 7484, 9355, 10900, 18710, 37420, 46775, 93550, 187100, 203939, 407878, 815756, 1019695, 2039390, 4078780, 5098475, 10196950, 20393900]

約数ペア:

[(1, 20393900), (2, 10196950), (4, 5098475), (5, 4078780), (10, 2039390), (20, 1019695), (25, 815756), (50, 407878), (100, 203939), (109, 187100), (218, 93550), (436, 46775), (545, 37420), (1090, 18710), (1871, 10900), (2180, 9355), (2725, 7484), (3742, 5450)]