21409227

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1129}}^1$

素因数の和:1192

約数の個数: 36

約数和(自身を含む): 36842520

約数和(自身を除く): 15433293

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 903, 1129, 2107, 2709, 3387, 6321, 7903, 10161, 18963, 23709, 48547, 55321, 71127, 145641, 165963, 339829, 436923, 497889, 1019487, 2378803, 3058461, 7136409, 21409227]

約数ペア:

[(1, 21409227), (3, 7136409), (7, 3058461), (9, 2378803), (21, 1019487), (43, 497889), (49, 436923), (63, 339829), (129, 165963), (147, 145641), (301, 71127), (387, 55321), (441, 48547), (903, 23709), (1129, 18963), (2107, 10161), (2709, 7903), (3387, 6321)]