638847

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{239}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 1048320

約数和(自身を除く): 409473

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 239, 243, 297, 717, 891, 2151, 2629, 2673, 6453, 7887, 19359, 23661, 58077, 70983, 212949, 638847]

約数ペア:

[(1, 638847), (3, 212949), (9, 70983), (11, 58077), (27, 23661), (33, 19359), (81, 7887), (99, 6453), (239, 2673), (243, 2629), (297, 2151), (717, 891)]