19959021

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{19979}}^1$

素因数の和:20025

約数の個数: 16

約数和(自身を含む): 30369600

約数和(自身を除く): 10410579

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 19979, 59937, 179811, 539433, 739223, 2217669, 6653007, 19959021]

約数ペア:

[(1, 19959021), (3, 6653007), (9, 2217669), (27, 739223), (37, 539433), (111, 179811), (333, 59937), (999, 19979)]