21040690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17389}}^1$

素因数の和:17418

約数の個数: 24

約数和(自身を含む): 41631660

約数和(自身を除く): 20590970

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17389, 34778, 86945, 173890, 191279, 382558, 956395, 1912790, 2104069, 4208138, 10520345, 21040690]

約数ペア:

[(1, 21040690), (2, 10520345), (5, 4208138), (10, 2104069), (11, 1912790), (22, 956395), (55, 382558), (110, 191279), (121, 173890), (242, 86945), (605, 34778), (1210, 17389)]