81636723

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{18251}}^1$

素因数の和:18335

約数の個数: 24

約数和(自身を含む): 136670976

約数和(自身を除く): 55034253

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 18251, 54753, 127757, 164259, 383271, 1149813, 1295821, 3887463, 9070747, 11662389, 27212241, 81636723]

約数ペア:

[(1, 81636723), (3, 27212241), (7, 11662389), (9, 9070747), (21, 3887463), (63, 1295821), (71, 1149813), (213, 383271), (497, 164259), (639, 127757), (1491, 54753), (4473, 18251)]