21387447

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{277}}^1\times {\mathrm{373}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 32439264

約数和(自身を除く): 11051817

約数列:

[1, 3, 9, 23, 69, 207, 277, 373, 831, 1119, 2493, 3357, 6371, 8579, 19113, 25737, 57339, 77211, 103321, 309963, 929889, 2376383, 7129149, 21387447]

約数ペア:

[(1, 21387447), (3, 7129149), (9, 2376383), (23, 929889), (69, 309963), (207, 103321), (277, 77211), (373, 57339), (831, 25737), (1119, 19113), (2493, 8579), (3357, 6371)]