19993431

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1\times {\mathrm{641}}^1$

素因数の和:962

約数の個数: 16

約数和(自身を含む): 27518688

約数和(自身を除く): 7525257

約数列:

[1, 3, 37, 111, 281, 641, 843, 1923, 10397, 23717, 31191, 71151, 180121, 540363, 6664477, 19993431]

約数ペア:

[(1, 19993431), (3, 6664477), (37, 540363), (111, 180121), (281, 71151), (641, 31191), (843, 23717), (1923, 10397)]