20289620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1069}}^1$

素因数の和:1164

約数の個数: 48

約数和(自身を含む): 46557840

約数和(自身を除く): 26268220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1069, 1460, 1898, 2138, 3796, 4276, 4745, 5345, 9490, 10690, 13897, 18980, 21380, 27794, 55588, 69485, 78037, 138970, 156074, 277940, 312148, 390185, 780370, 1014481, 1560740, 2028962, 4057924, 5072405, 10144810, 20289620]

約数ペア:

[(1, 20289620), (2, 10144810), (4, 5072405), (5, 4057924), (10, 2028962), (13, 1560740), (20, 1014481), (26, 780370), (52, 390185), (65, 312148), (73, 277940), (130, 156074), (146, 138970), (260, 78037), (292, 69485), (365, 55588), (730, 27794), (949, 21380), (1069, 18980), (1460, 13897), (1898, 10690), (2138, 9490), (3796, 5345), (4276, 4745)]