19981258

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{24547}}^1$

素因数の和:24597

約数の個数: 16

約数和(自身を含む): 33581664

約数和(自身を除く): 13600406

約数列:

[1, 2, 11, 22, 37, 74, 407, 814, 24547, 49094, 270017, 540034, 908239, 1816478, 9990629, 19981258]

約数ペア:

[(1, 19981258), (2, 9990629), (11, 1816478), (22, 908239), (37, 540034), (74, 270017), (407, 49094), (814, 24547)]