21612087

素因数分解:

$3^2\times 7^3\times {\mathrm{7001}}^1$

素因数の和:7028

約数の個数: 24

約数和(自身を含む): 36410400

約数和(自身を除く): 14798313

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 7001, 21003, 49007, 63009, 147021, 343049, 441063, 1029147, 2401343, 3087441, 7204029, 21612087]

約数ペア:

[(1, 21612087), (3, 7204029), (7, 3087441), (9, 2401343), (21, 1029147), (49, 441063), (63, 343049), (147, 147021), (343, 63009), (441, 49007), (1029, 21003), (3087, 7001)]