620781

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:161

約数の個数: 24

約数和(自身を含む): 995904

約数和(自身を除く): 375123

約数列:

[1, 3, 7, 21, 41, 49, 103, 123, 147, 287, 309, 721, 861, 2009, 2163, 4223, 5047, 6027, 12669, 15141, 29561, 88683, 206927, 620781]

約数ペア:

[(1, 620781), (3, 206927), (7, 88683), (21, 29561), (41, 15141), (49, 12669), (103, 6027), (123, 5047), (147, 4223), (287, 2163), (309, 2009), (721, 861)]