81878657

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2837}}^1$

素因数の和:2901

約数の個数: 24

約数和(自身を含む): 103530240

約数和(自身を除く): 21651583

約数列:

[1, 7, 19, 31, 49, 133, 217, 589, 931, 1519, 2837, 4123, 19859, 28861, 53903, 87947, 139013, 377321, 615629, 1670993, 2641247, 4309403, 11696951, 81878657]

約数ペア:

[(1, 81878657), (7, 11696951), (19, 4309403), (31, 2641247), (49, 1670993), (133, 615629), (217, 377321), (589, 139013), (931, 87947), (1519, 53903), (2837, 28861), (4123, 19859)]