247285143

素因数分解:

$3^4\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1697}}^1$

素因数の和:1973

約数の個数: 40

約数和(自身を含む): 424065312

約数和(自身を除く): 176780169

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 257, 567, 771, 1697, 1799, 2313, 5091, 5397, 6939, 11879, 15273, 16191, 20817, 35637, 45819, 48573, 106911, 137457, 145719, 320733, 436129, 962199, 1308387, 3052903, 3925161, 9158709, 11775483, 27476127, 35326449, 82428381, 247285143]

約数ペア:

[(1, 247285143), (3, 82428381), (7, 35326449), (9, 27476127), (21, 11775483), (27, 9158709), (63, 3925161), (81, 3052903), (189, 1308387), (257, 962199), (567, 436129), (771, 320733), (1697, 145719), (1799, 137457), (2313, 106911), (5091, 48573), (5397, 45819), (6939, 35637), (11879, 20817), (15273, 16191)]