21002709

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{719}}^1$

素因数の和:849

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 13833771

約数列:

[1, 3, 7, 13, 21, 39, 91, 107, 273, 321, 719, 749, 1391, 2157, 2247, 4173, 5033, 9347, 9737, 15099, 28041, 29211, 65429, 76933, 196287, 230799, 538531, 1000129, 1615593, 3000387, 7000903, 21002709]

約数ペア:

[(1, 21002709), (3, 7000903), (7, 3000387), (13, 1615593), (21, 1000129), (39, 538531), (91, 230799), (107, 196287), (273, 76933), (321, 65429), (719, 29211), (749, 28041), (1391, 15099), (2157, 9737), (2247, 9347), (4173, 5033)]