21005319

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1\times {\mathrm{1709}}^1$

素因数の和:1970

約数の個数: 16

約数和(自身を含む): 29795040

約数和(自身を除く): 8789721

約数列:

[1, 3, 17, 51, 241, 723, 1709, 4097, 5127, 12291, 29053, 87159, 411869, 1235607, 7001773, 21005319]

約数ペア:

[(1, 21005319), (3, 7001773), (17, 1235607), (51, 411869), (241, 87159), (723, 29053), (1709, 12291), (4097, 5127)]