21782019

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{2087}}^1$

素因数の和:2175

約数の個数: 24

約数和(自身を含む): 34276608

約数和(自身を除く): 12494589

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 2087, 3479, 6261, 10437, 14609, 43827, 102263, 148177, 306789, 444531, 1037239, 3111717, 7260673, 21782019]

約数ペア:

[(1, 21782019), (3, 7260673), (7, 3111717), (21, 1037239), (49, 444531), (71, 306789), (147, 148177), (213, 102263), (497, 43827), (1491, 14609), (2087, 10437), (3479, 6261)]