19887091

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{521}}^1$

素因数の和:595

約数の個数: 24

約数和(自身を含む): 24993360

約数和(自身を除く): 5106269

約数列:

[1, 7, 19, 41, 49, 133, 287, 521, 779, 931, 2009, 3647, 5453, 9899, 21361, 25529, 38171, 69293, 149527, 405859, 485051, 1046689, 2841013, 19887091]

約数ペア:

[(1, 19887091), (7, 2841013), (19, 1046689), (41, 485051), (49, 405859), (133, 149527), (287, 69293), (521, 38171), (779, 25529), (931, 21361), (2009, 9899), (3647, 5453)]