21978054

素因数分解:

$2^1\times 3^4\times 7^1\times {\mathrm{19381}}^1$

素因数の和:19402

約数の個数: 40

約数和(自身を含む): 56285328

約数和(自身を除く): 34307274

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 81, 126, 162, 189, 378, 567, 1134, 19381, 38762, 58143, 116286, 135667, 174429, 271334, 348858, 407001, 523287, 814002, 1046574, 1221003, 1569861, 2442006, 3139722, 3663009, 7326018, 10989027, 21978054]

約数ペア:

[(1, 21978054), (2, 10989027), (3, 7326018), (6, 3663009), (7, 3139722), (9, 2442006), (14, 1569861), (18, 1221003), (21, 1046574), (27, 814002), (42, 523287), (54, 407001), (63, 348858), (81, 271334), (126, 174429), (162, 135667), (189, 116286), (378, 58143), (567, 38762), (1134, 19381)]