820399209

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{328291}}^1$

素因数の和:328325

約数の個数: 24

約数和(自身を含む): 1347310368

約数和(自身を除く): 526911159

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 328291, 984873, 2298037, 5580947, 6894111, 16086259, 16742841, 39066629, 48258777, 117199887, 273466403, 820399209]

約数ペア:

[(1, 820399209), (3, 273466403), (7, 117199887), (17, 48258777), (21, 39066629), (49, 16742841), (51, 16086259), (119, 6894111), (147, 5580947), (357, 2298037), (833, 984873), (2499, 328291)]