28757781

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{81931}}^1$

素因数の和:81953

約数の個数: 16

約数和(自身を含む): 45881920

約数和(自身を除く): 17124139

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 81931, 245793, 737379, 1065103, 2212137, 3195309, 9585927, 28757781]

約数ペア:

[(1, 28757781), (3, 9585927), (9, 3195309), (13, 2212137), (27, 1065103), (39, 737379), (117, 245793), (351, 81931)]