20897668

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43177}}^1$

素因数の和:43203

約数の個数: 18

約数和(自身を含む): 40198718

約数和(自身を除く): 19301050

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43177, 86354, 172708, 474947, 949894, 1899788, 5224417, 10448834, 20897668]

約数ペア:

[(1, 20897668), (2, 10448834), (4, 5224417), (11, 1899788), (22, 949894), (44, 474947), (121, 172708), (242, 86354), (484, 43177)]