21278092

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43963}}^1$

素因数の和:43989

約数の個数: 18

約数和(自身を含む): 40930484

約数和(自身を除く): 19652392

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43963, 87926, 175852, 483593, 967186, 1934372, 5319523, 10639046, 21278092]

約数ペア:

[(1, 21278092), (2, 10639046), (4, 5319523), (11, 1934372), (22, 967186), (44, 483593), (121, 175852), (242, 87926), (484, 43963)]