20985580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13627}}^1$

素因数の和:13654

約数の個数: 48

約数和(自身を含む): 54948096

約数和(自身を除く): 33962516

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, 13627, 27254, 54508, 68135, 95389, 136270, 149897, 190778, 272540, 299794, 381556, 476945, 599588, 749485, 953890, 1049279, 1498970, 1907780, 2098558, 2997940, 4197116, 5246395, 10492790, 20985580]

約数ペア:

[(1, 20985580), (2, 10492790), (4, 5246395), (5, 4197116), (7, 2997940), (10, 2098558), (11, 1907780), (14, 1498970), (20, 1049279), (22, 953890), (28, 749485), (35, 599588), (44, 476945), (55, 381556), (70, 299794), (77, 272540), (110, 190778), (140, 149897), (154, 136270), (220, 95389), (308, 68135), (385, 54508), (770, 27254), (1540, 13627)]