81965288

素因数分解:

$2^3\times {\mathrm{509}}^1\times {\mathrm{20129}}^1$

素因数の和:20644

約数の個数: 16

約数和(自身を含む): 153994500

約数和(自身を除く): 72029212

約数列:

[1, 2, 4, 8, 509, 1018, 2036, 4072, 20129, 40258, 80516, 161032, 10245661, 20491322, 40982644, 81965288]

約数ペア:

[(1, 81965288), (2, 40982644), (4, 20491322), (8, 10245661), (509, 161032), (1018, 80516), (2036, 40258), (4072, 20129)]