21331917

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4969}}^1$

素因数の和:5034

約数の個数: 20

約数和(自身を含む): 32473980

約数和(自身を除く): 11142063

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4969, 14907, 44721, 134163, 263357, 402489, 790071, 2370213, 7110639, 21331917]

約数ペア:

[(1, 21331917), (3, 7110639), (9, 2370213), (27, 790071), (53, 402489), (81, 263357), (159, 134163), (477, 44721), (1431, 14907), (4293, 4969)]