20925711

素因数分解:

$3^2\times {\mathrm{83}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:455

約数の個数: 24

約数和(自身を含む): 30990960

約数和(自身を除く): 10065249

約数列:

[1, 3, 9, 83, 109, 249, 257, 327, 747, 771, 981, 2313, 9047, 21331, 27141, 28013, 63993, 81423, 84039, 191979, 252117, 2325079, 6975237, 20925711]

約数ペア:

[(1, 20925711), (3, 6975237), (9, 2325079), (83, 252117), (109, 191979), (249, 84039), (257, 81423), (327, 63993), (747, 28013), (771, 27141), (981, 21331), (2313, 9047)]