21342860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13859}}^1$

素因数の和:13886

約数の個数: 48

約数和(自身を含む): 55883520

約数和(自身を除く): 34540660

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, 13859, 27718, 55436, 69295, 97013, 138590, 152449, 194026, 277180, 304898, 388052, 485065, 609796, 762245, 970130, 1067143, 1524490, 1940260, 2134286, 3048980, 4268572, 5335715, 10671430, 21342860]

約数ペア:

[(1, 21342860), (2, 10671430), (4, 5335715), (5, 4268572), (7, 3048980), (10, 2134286), (11, 1940260), (14, 1524490), (20, 1067143), (22, 970130), (28, 762245), (35, 609796), (44, 485065), (55, 388052), (70, 304898), (77, 277180), (110, 194026), (140, 152449), (154, 138590), (220, 97013), (308, 69295), (385, 55436), (770, 27718), (1540, 13859)]