81698787

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{19777}}^1$

素因数の和:19809

約数の個数: 24

約数和(自身を含む): 129585456

約数和(自身を除く): 47886669

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 243, 459, 1377, 4131, 19777, 59331, 177993, 336209, 533979, 1008627, 1601937, 3025881, 4805811, 9077643, 27232929, 81698787]

約数ペア:

[(1, 81698787), (3, 27232929), (9, 9077643), (17, 4805811), (27, 3025881), (51, 1601937), (81, 1008627), (153, 533979), (243, 336209), (459, 177993), (1377, 59331), (4131, 19777)]