72009

素因数分解:

$3^4\times 7^1\times {\mathrm{127}}^1$

素因数の和:146

約数の個数: 20

約数和(自身を含む): 123904

約数和(自身を除く): 51895

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 127, 189, 381, 567, 889, 1143, 2667, 3429, 8001, 10287, 24003, 72009]

約数ペア:

[(1, 72009), (3, 24003), (7, 10287), (9, 8001), (21, 3429), (27, 2667), (63, 1143), (81, 889), (127, 567), (189, 381)]