81751649

素因数分解:

$7^4\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:538

約数の個数: 20

約数和(自身を含む): 96802560

約数和(自身を除く): 15050911

約数列:

[1, 7, 49, 79, 343, 431, 553, 2401, 3017, 3871, 21119, 27097, 34049, 147833, 189679, 238343, 1034831, 1668401, 11678807, 81751649]

約数ペア:

[(1, 81751649), (7, 11678807), (49, 1668401), (79, 1034831), (343, 238343), (431, 189679), (553, 147833), (2401, 34049), (3017, 27097), (3871, 21119)]