21530439

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17987}}^1$

素因数の和:18019

約数の個数: 24

約数和(自身を含む): 37415040

約数和(自身を除く): 15884601

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17987, 53961, 125909, 161883, 341753, 377727, 1025259, 1133181, 2392271, 3075777, 7176813, 21530439]

約数ペア:

[(1, 21530439), (3, 7176813), (7, 3075777), (9, 2392271), (19, 1133181), (21, 1025259), (57, 377727), (63, 341753), (133, 161883), (171, 125909), (399, 53961), (1197, 17987)]