20038780

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4493}}^1$

素因数の和:4725

約数の個数: 24

約数和(自身を含む): 42279552

約数和(自身を除く): 22240772

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4493, 8986, 17972, 22465, 44930, 89860, 1001939, 2003878, 4007756, 5009695, 10019390, 20038780]

約数ペア:

[(1, 20038780), (2, 10019390), (4, 5009695), (5, 4007756), (10, 2003878), (20, 1001939), (223, 89860), (446, 44930), (892, 22465), (1115, 17972), (2230, 8986), (4460, 4493)]