21052749

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{509}}^1\times {\mathrm{811}}^1$

素因数の和:1340

約数の個数: 16

約数和(自身を含む): 29816640

約数和(自身を除く): 8763891

約数列:

[1, 3, 17, 51, 509, 811, 1527, 2433, 8653, 13787, 25959, 41361, 412799, 1238397, 7017583, 21052749]

約数ペア:

[(1, 21052749), (3, 7017583), (17, 1238397), (51, 412799), (509, 41361), (811, 25959), (1527, 13787), (2433, 8653)]