19721398

素因数分解:

$2^1\times {\mathrm{157}}^1\times {\mathrm{181}}^1\times {\mathrm{347}}^1$

素因数の和:687

約数の個数: 16

約数和(自身を含む): 30021264

約数和(自身を除く): 10299866

約数列:

[1, 2, 157, 181, 314, 347, 362, 694, 28417, 54479, 56834, 62807, 108958, 125614, 9860699, 19721398]

約数ペア:

[(1, 19721398), (2, 9860699), (157, 125614), (181, 108958), (314, 62807), (347, 56834), (362, 54479), (694, 28417)]