20990438

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{28289}}^1$

素因数の和:28351

約数の個数: 16

約数和(自身を含む): 36663840

約数和(自身を除く): 15673402

約数列:

[1, 2, 7, 14, 53, 106, 371, 742, 28289, 56578, 198023, 396046, 1499317, 2998634, 10495219, 20990438]

約数ペア:

[(1, 20990438), (2, 10495219), (7, 2998634), (14, 1499317), (53, 396046), (106, 198023), (371, 56578), (742, 28289)]