81423981

素因数分解:

$3^3\times {\mathrm{73}}^1\times {\mathrm{109}}^1\times {\mathrm{379}}^1$

素因数の和:570

約数の個数: 32

約数和(自身を含む): 123728000

約数和(自身を除く): 42304019

約数列:

[1, 3, 9, 27, 73, 109, 219, 327, 379, 657, 981, 1137, 1971, 2943, 3411, 7957, 10233, 23871, 27667, 41311, 71613, 83001, 123933, 214839, 249003, 371799, 747009, 1115397, 3015703, 9047109, 27141327, 81423981]

約数ペア:

[(1, 81423981), (3, 27141327), (9, 9047109), (27, 3015703), (73, 1115397), (109, 747009), (219, 371799), (327, 249003), (379, 214839), (657, 123933), (981, 83001), (1137, 71613), (1971, 41311), (2943, 27667), (3411, 23871), (7957, 10233)]