21129879

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{1789}}^1$

素因数の和:1950

約数の個数: 16

約数和(自身を含む): 29327360

約数和(自身を除く): 8197481

約数列:

[1, 3, 31, 93, 127, 381, 1789, 3937, 5367, 11811, 55459, 166377, 227203, 681609, 7043293, 21129879]

約数ペア:

[(1, 21129879), (3, 7043293), (31, 681609), (93, 227203), (127, 166377), (381, 55459), (1789, 11811), (3937, 5367)]