21049639

素因数分解:

${\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:426

約数の個数: 16

約数和(自身を含む): 23369472

約数和(自身を除く): 2319833

約数列:

[1, 13, 53, 137, 223, 689, 1781, 2899, 7261, 11819, 30551, 94393, 153647, 397163, 1619203, 21049639]

約数ペア:

[(1, 21049639), (13, 1619203), (53, 397163), (137, 153647), (223, 94393), (689, 30551), (1781, 11819), (2899, 7261)]