21295449

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1123}}^1$

素因数の和:1186

約数の個数: 36

約数和(自身を含む): 36646896

約数和(自身を除く): 15351447

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 903, 1123, 2107, 2709, 3369, 6321, 7861, 10107, 18963, 23583, 48289, 55027, 70749, 144867, 165081, 338023, 434601, 495243, 1014069, 2366161, 3042207, 7098483, 21295449]

約数ペア:

[(1, 21295449), (3, 7098483), (7, 3042207), (9, 2366161), (21, 1014069), (43, 495243), (49, 434601), (63, 338023), (129, 165081), (147, 144867), (301, 70749), (387, 55027), (441, 48289), (903, 23583), (1123, 18963), (2107, 10107), (2709, 7861), (3369, 6321)]