257838189

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{4649}}^1$

素因数の和:4817

約数の個数: 32

約数和(自身を含む): 416640000

約数和(自身を除く): 158801811

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 399, 417, 973, 2641, 2919, 4649, 7923, 13947, 18487, 32543, 55461, 88331, 97629, 264993, 618317, 646211, 1854951, 1938633, 4523477, 12278009, 13570431, 36834027, 85946063, 257838189]

約数ペア:

[(1, 257838189), (3, 85946063), (7, 36834027), (19, 13570431), (21, 12278009), (57, 4523477), (133, 1938633), (139, 1854951), (399, 646211), (417, 618317), (973, 264993), (2641, 97629), (2919, 88331), (4649, 55461), (7923, 32543), (13947, 18487)]