81989739

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{77863}}^1$

素因数の和:77888

約数の個数: 20

約数和(自身を含む): 131901616

約数和(自身を除く): 49911877

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 77863, 233589, 700767, 1012219, 2102301, 3036657, 6306903, 9109971, 27329913, 81989739]

約数ペア:

[(1, 81989739), (3, 27329913), (9, 9109971), (13, 6306903), (27, 3036657), (39, 2102301), (81, 1012219), (117, 700767), (351, 233589), (1053, 77863)]