257397

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{103}}^1$

素因数の和:137

約数の個数: 24

約数和(自身を含む): 426816

約数和(自身を除く): 169419

約数列:

[1, 3, 7, 17, 21, 49, 51, 103, 119, 147, 309, 357, 721, 833, 1751, 2163, 2499, 5047, 5253, 12257, 15141, 36771, 85799, 257397]

約数ペア:

[(1, 257397), (3, 85799), (7, 36771), (17, 15141), (21, 12257), (49, 5253), (51, 5047), (103, 2499), (119, 2163), (147, 1751), (309, 833), (357, 721)]