20708908

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{42787}}^1$

素因数の和:42813

約数の個数: 18

約数和(自身を含む): 39835628

約数和(自身を除く): 19126720

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 42787, 85574, 171148, 470657, 941314, 1882628, 5177227, 10354454, 20708908]

約数ペア:

[(1, 20708908), (2, 10354454), (4, 5177227), (11, 1882628), (22, 941314), (44, 470657), (121, 171148), (242, 85574), (484, 42787)]