20846980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13537}}^1$

素因数の和:13564

約数の個数: 48

約数和(自身を含む): 54585216

約数和(自身を除く): 33738236

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13537, 27074, 54148, 67685, 94759, 135370, 148907, 189518, 270740, 297814, 379036, 473795, 595628, 744535, 947590, 1042349, 1489070, 1895180, 2084698, 2978140, 4169396, 5211745, 10423490, 20846980]

約数ペア:

[(1, 20846980), (2, 10423490), (4, 5211745), (5, 4169396), (7, 2978140), (10, 2084698), (11, 1895180), (14, 1489070), (20, 1042349), (22, 947590), (28, 744535), (35, 595628), (44, 473795), (55, 379036), (70, 297814), (77, 270740), (110, 189518), (140, 148907), (154, 135370), (220, 94759), (308, 67685), (385, 54148), (770, 27074), (1540, 13537)]