19901566

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{1249}}^1$

素因数の和:1539

約数の個数: 16

約数和(自身を含む): 30960000

約数和(自身を除く): 11058434

約数列:

[1, 2, 31, 62, 257, 514, 1249, 2498, 7967, 15934, 38719, 77438, 320993, 641986, 9950783, 19901566]

約数ペア:

[(1, 19901566), (2, 9950783), (31, 641986), (62, 320993), (257, 77438), (514, 38719), (1249, 15934), (2498, 7967)]