21389151

素因数分解:

$3^1\times 7^1\times {\mathrm{809}}^1\times {\mathrm{1259}}^1$

素因数の和:2078

約数の個数: 16

約数和(自身を含む): 32659200

約数和(自身を除く): 11270049

約数列:

[1, 3, 7, 21, 809, 1259, 2427, 3777, 5663, 8813, 16989, 26439, 1018531, 3055593, 7129717, 21389151]

約数ペア:

[(1, 21389151), (3, 7129717), (7, 3055593), (21, 1018531), (809, 26439), (1259, 16989), (2427, 8813), (3777, 5663)]