20811378

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{997}}^1$

素因数の和:1087

約数の個数: 48

約数和(自身を含む): 49149504

約数和(自身を除く): 28338126

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 71, 98, 142, 147, 213, 294, 426, 497, 994, 997, 1491, 1994, 2982, 2991, 3479, 5982, 6958, 6979, 10437, 13958, 20874, 20937, 41874, 48853, 70787, 97706, 141574, 146559, 212361, 293118, 424722, 495509, 991018, 1486527, 2973054, 3468563, 6937126, 10405689, 20811378]

約数ペア:

[(1, 20811378), (2, 10405689), (3, 6937126), (6, 3468563), (7, 2973054), (14, 1486527), (21, 991018), (42, 495509), (49, 424722), (71, 293118), (98, 212361), (142, 146559), (147, 141574), (213, 97706), (294, 70787), (426, 48853), (497, 41874), (994, 20937), (997, 20874), (1491, 13958), (1994, 10437), (2982, 6979), (2991, 6958), (3479, 5982)]