21166971

素因数分解:

$3^1\times 7^2\times {\mathrm{311}}^1\times {\mathrm{463}}^1$

素因数の和:791

約数の個数: 24

約数和(自身を含む): 33007104

約数和(自身を除く): 11840133

約数列:

[1, 3, 7, 21, 49, 147, 311, 463, 933, 1389, 2177, 3241, 6531, 9723, 15239, 22687, 45717, 68061, 143993, 431979, 1007951, 3023853, 7055657, 21166971]

約数ペア:

[(1, 21166971), (3, 7055657), (7, 3023853), (21, 1007951), (49, 431979), (147, 143993), (311, 68061), (463, 45717), (933, 22687), (1389, 15239), (2177, 9723), (3241, 6531)]