20289260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 23951860

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 109, 164, 205, 218, 227, 410, 436, 454, 545, 820, 908, 1090, 1135, 2180, 2270, 4469, 4540, 8938, 9307, 17876, 18614, 22345, 24743, 37228, 44690, 46535, 49486, 89380, 93070, 98972, 123715, 186140, 247430, 494860, 1014463, 2028926, 4057852, 5072315, 10144630, 20289260]

約数ペア:

[(1, 20289260), (2, 10144630), (4, 5072315), (5, 4057852), (10, 2028926), (20, 1014463), (41, 494860), (82, 247430), (109, 186140), (164, 123715), (205, 98972), (218, 93070), (227, 89380), (410, 49486), (436, 46535), (454, 44690), (545, 37228), (820, 24743), (908, 22345), (1090, 18614), (1135, 17876), (2180, 9307), (2270, 8938), (4469, 4540)]