21809403

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2861}}^1$

素因数の和:2896

約数の個数: 36

約数和(自身を含む): 39587184

約数和(自身を除く): 17777781

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 121, 231, 363, 693, 847, 1089, 2541, 2861, 7623, 8583, 20027, 25749, 31471, 60081, 94413, 180243, 220297, 283239, 346181, 660891, 1038543, 1982673, 2423267, 3115629, 7269801, 21809403]

約数ペア:

[(1, 21809403), (3, 7269801), (7, 3115629), (9, 2423267), (11, 1982673), (21, 1038543), (33, 660891), (63, 346181), (77, 283239), (99, 220297), (121, 180243), (231, 94413), (363, 60081), (693, 31471), (847, 25749), (1089, 20027), (2541, 8583), (2861, 7623)]