21065907

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{17959}}^1$

素因数の和:18002

約数の個数: 16

約数和(自身を含む): 31034880

約数和(自身を除く): 9968973

約数列:

[1, 3, 17, 23, 51, 69, 391, 1173, 17959, 53877, 305303, 413057, 915909, 1239171, 7021969, 21065907]

約数ペア:

[(1, 21065907), (3, 7021969), (17, 1239171), (23, 915909), (51, 413057), (69, 305303), (391, 53877), (1173, 17959)]