278511

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:190

約数の個数: 16

約数和(自身を含む): 405504

約数和(自身を除く): 126993

約数列:

[1, 3, 17, 43, 51, 127, 129, 381, 731, 2159, 2193, 5461, 6477, 16383, 92837, 278511]

約数ペア:

[(1, 278511), (3, 92837), (17, 16383), (43, 6477), (51, 5461), (127, 2193), (129, 2159), (381, 731)]