21039939

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21061}}^1$

素因数の和:21107

約数の個数: 16

約数和(自身を含む): 32014240

約数和(自身を除く): 10974301

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21061, 63183, 189549, 568647, 779257, 2337771, 7013313, 21039939]

約数ペア:

[(1, 21039939), (3, 7013313), (9, 2337771), (27, 779257), (37, 568647), (111, 189549), (333, 63183), (999, 21061)]