261387

素因数分解:

$3^4\times 7^1\times {\mathrm{461}}^1$

素因数の和:480

約数の個数: 20

約数和(自身を含む): 447216

約数和(自身を除く): 185829

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 461, 567, 1383, 3227, 4149, 9681, 12447, 29043, 37341, 87129, 261387]

約数ペア:

[(1, 261387), (3, 87129), (7, 37341), (9, 29043), (21, 12447), (27, 9681), (63, 4149), (81, 3227), (189, 1383), (461, 567)]