208291209

素因数分解:

$3^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{2851}}^1$

素因数の和:2946

約数の個数: 32

約数和(自身を含む): 328550400

約数和(自身を除く): 120259191

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 343, 497, 1029, 1491, 2851, 3479, 8553, 10437, 19957, 24353, 59871, 73059, 139699, 202421, 419097, 607263, 977893, 1416947, 2933679, 4250841, 9918629, 29755887, 69430403, 208291209]

約数ペア:

[(1, 208291209), (3, 69430403), (7, 29755887), (21, 9918629), (49, 4250841), (71, 2933679), (147, 1416947), (213, 977893), (343, 607263), (497, 419097), (1029, 202421), (1491, 139699), (2851, 73059), (3479, 59871), (8553, 24353), (10437, 19957)]