20538980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13337}}^1$

素因数の和:13364

約数の個数: 48

約数和(自身を含む): 53778816

約数和(自身を除く): 33239836

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, 13337, 26674, 53348, 66685, 93359, 133370, 146707, 186718, 266740, 293414, 373436, 466795, 586828, 733535, 933590, 1026949, 1467070, 1867180, 2053898, 2934140, 4107796, 5134745, 10269490, 20538980]

約数ペア:

[(1, 20538980), (2, 10269490), (4, 5134745), (5, 4107796), (7, 2934140), (10, 2053898), (11, 1867180), (14, 1467070), (20, 1026949), (22, 933590), (28, 733535), (35, 586828), (44, 466795), (55, 373436), (70, 293414), (77, 266740), (110, 186718), (140, 146707), (154, 133370), (220, 93359), (308, 66685), (385, 53348), (770, 26674), (1540, 13337)]