81661244

素因数分解:

$2^2\times 7^2\times {\mathrm{401}}^1\times {\mathrm{1039}}^1$

素因数の和:1458

約数の個数: 36

約数和(自身を含む): 166813920

約数和(自身を除く): 85152676

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 401, 802, 1039, 1604, 2078, 2807, 4156, 5614, 7273, 11228, 14546, 19649, 29092, 39298, 50911, 78596, 101822, 203644, 416639, 833278, 1666556, 2916473, 5832946, 11665892, 20415311, 40830622, 81661244]

約数ペア:

[(1, 81661244), (2, 40830622), (4, 20415311), (7, 11665892), (14, 5832946), (28, 2916473), (49, 1666556), (98, 833278), (196, 416639), (401, 203644), (802, 101822), (1039, 78596), (1604, 50911), (2078, 39298), (2807, 29092), (4156, 19649), (5614, 14546), (7273, 11228)]