21102904

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{701}}^1$

素因数の和:831

約数の個数: 32

約数和(自身を含む): 40940640

約数和(自身を除く): 19837736

約数列:

[1, 2, 4, 8, 53, 71, 106, 142, 212, 284, 424, 568, 701, 1402, 2804, 3763, 5608, 7526, 15052, 30104, 37153, 49771, 74306, 99542, 148612, 199084, 297224, 398168, 2637863, 5275726, 10551452, 21102904]

約数ペア:

[(1, 21102904), (2, 10551452), (4, 5275726), (8, 2637863), (53, 398168), (71, 297224), (106, 199084), (142, 148612), (212, 99542), (284, 74306), (424, 49771), (568, 37153), (701, 30104), (1402, 15052), (2804, 7526), (3763, 5608)]