21047139

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{5981}}^1$

素因数の和:6027

約数の個数: 24

約数和(自身を含む): 33594912

約数和(自身を除く): 12547773

約数列:

[1, 3, 9, 17, 23, 51, 69, 153, 207, 391, 1173, 3519, 5981, 17943, 53829, 101677, 137563, 305031, 412689, 915093, 1238067, 2338571, 7015713, 21047139]

約数ペア:

[(1, 21047139), (3, 7015713), (9, 2338571), (17, 1238067), (23, 915093), (51, 412689), (69, 305031), (153, 137563), (207, 101677), (391, 53829), (1173, 17943), (3519, 5981)]