20867427

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7703}}^1$

素因数の和:7759

約数の個数: 24

約数和(自身を含む): 35253504

約数和(自身を除く): 14386077

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7703, 23109, 53921, 69327, 161763, 331229, 485289, 993687, 2318603, 2981061, 6955809, 20867427]

約数ペア:

[(1, 20867427), (3, 6955809), (7, 2981061), (9, 2318603), (21, 993687), (43, 485289), (63, 331229), (129, 161763), (301, 69327), (387, 53921), (903, 23109), (2709, 7703)]