81508609

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{643}}^1$

素因数の和:869

約数の個数: 24

約数和(自身を含む): 102782400

約数和(自身を除く): 21273791

約数列:

[1, 7, 13, 49, 91, 199, 637, 643, 1393, 2587, 4501, 8359, 9751, 18109, 31507, 58513, 126763, 127957, 409591, 895699, 1663441, 6269893, 11644087, 81508609]

約数ペア:

[(1, 81508609), (7, 11644087), (13, 6269893), (49, 1663441), (91, 895699), (199, 409591), (637, 127957), (643, 126763), (1393, 58513), (2587, 31507), (4501, 18109), (8359, 9751)]