81221812

素因数分解:

$2^2\times 7^2\times {\mathrm{414397}}^1$

素因数の和:414415

約数の個数: 18

約数和(自身を含む): 165344802

約数和(自身を除く): 84122990

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 414397, 828794, 1657588, 2900779, 5801558, 11603116, 20305453, 40610906, 81221812]

約数ペア:

[(1, 81221812), (2, 40610906), (4, 20305453), (7, 11603116), (14, 5801558), (28, 2900779), (49, 1657588), (98, 828794), (196, 414397)]