20288740

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1993}}^1$

素因数の和:2511

約数の個数: 24

約数和(自身を含む): 42711480

約数和(自身を除く): 22422740

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1993, 2036, 2545, 3986, 5090, 7972, 9965, 10180, 19930, 39860, 1014437, 2028874, 4057748, 5072185, 10144370, 20288740]

約数ペア:

[(1, 20288740), (2, 10144370), (4, 5072185), (5, 4057748), (10, 2028874), (20, 1014437), (509, 39860), (1018, 19930), (1993, 10180), (2036, 9965), (2545, 7972), (3986, 5090)]