21123897

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1\times {\mathrm{653}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 29006208

約数和(自身を除く): 7882311

約数列:

[1, 3, 41, 123, 263, 653, 789, 1959, 10783, 26773, 32349, 80319, 171739, 515217, 7041299, 21123897]

約数ペア:

[(1, 21123897), (3, 7041299), (41, 515217), (123, 171739), (263, 80319), (653, 32349), (789, 26773), (1959, 10783)]