257697237

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{16787}}^1$

素因数の和:16857

約数の個数: 32

約数和(自身を含む): 425475072

約数和(自身を除く): 167777835

約数列:

[1, 3, 7, 17, 21, 43, 51, 119, 129, 301, 357, 731, 903, 2193, 5117, 15351, 16787, 50361, 117509, 285379, 352527, 721841, 856137, 1997653, 2165523, 5052887, 5992959, 12271297, 15158661, 36813891, 85899079, 257697237]

約数ペア:

[(1, 257697237), (3, 85899079), (7, 36813891), (17, 15158661), (21, 12271297), (43, 5992959), (51, 5052887), (119, 2165523), (129, 1997653), (301, 856137), (357, 721841), (731, 352527), (903, 285379), (2193, 117509), (5117, 50361), (15351, 16787)]