21308301

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 15757299

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 107, 109, 203, 261, 321, 327, 609, 749, 763, 963, 981, 1827, 2247, 2289, 3103, 3161, 6741, 6867, 9309, 9483, 11663, 21721, 22127, 27927, 28449, 34989, 65163, 66381, 81641, 104967, 195489, 199143, 244923, 338227, 734769, 1014681, 2367589, 3044043, 7102767, 21308301]

約数ペア:

[(1, 21308301), (3, 7102767), (7, 3044043), (9, 2367589), (21, 1014681), (29, 734769), (63, 338227), (87, 244923), (107, 199143), (109, 195489), (203, 104967), (261, 81641), (321, 66381), (327, 65163), (609, 34989), (749, 28449), (763, 27927), (963, 22127), (981, 21721), (1827, 11663), (2247, 9483), (2289, 9309), (3103, 6867), (3161, 6741)]