21394971

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1709}}^1$

素因数の和:1835

約数の個数: 24

約数和(自身を含む): 33611760

約数和(自身を除く): 12216789

約数列:

[1, 3, 9, 13, 39, 107, 117, 321, 963, 1391, 1709, 4173, 5127, 12519, 15381, 22217, 66651, 182863, 199953, 548589, 1645767, 2377219, 7131657, 21394971]

約数ペア:

[(1, 21394971), (3, 7131657), (9, 2377219), (13, 1645767), (39, 548589), (107, 199953), (117, 182863), (321, 66651), (963, 22217), (1391, 15381), (1709, 12519), (4173, 5127)]