16781961

素因数分解:

$3^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:418

約数の個数: 32

約数和(自身を含む): 26726400

約数和(自身を除く): 9944439

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 343, 347, 987, 1029, 1041, 2303, 2429, 6909, 7287, 16121, 16309, 17003, 48363, 48927, 51009, 114163, 119021, 342489, 357063, 799141, 2397423, 5593987, 16781961]

約数ペア:

[(1, 16781961), (3, 5593987), (7, 2397423), (21, 799141), (47, 357063), (49, 342489), (141, 119021), (147, 114163), (329, 51009), (343, 48927), (347, 48363), (987, 17003), (1029, 16309), (1041, 16121), (2303, 7287), (2429, 6909)]