81568215

素因数分解:

$3^4\times 5^1\times {\mathrm{201403}}^1$

素因数の和:201420

約数の個数: 20

約数和(自身を含む): 146219304

約数和(自身を除く): 64651089

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 201403, 604209, 1007015, 1812627, 3021045, 5437881, 9063135, 16313643, 27189405, 81568215]

約数ペア:

[(1, 81568215), (3, 27189405), (5, 16313643), (9, 9063135), (15, 5437881), (27, 3021045), (45, 1812627), (81, 1007015), (135, 604209), (405, 201403)]