21453033

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7681}}^1$

素因数の和:7717

約数の個数: 24

約数和(自身を含む): 35029920

約数和(自身を除く): 13576887

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7681, 23043, 53767, 145939, 161301, 376369, 437817, 1021573, 1129107, 3064719, 7151011, 21453033]

約数ペア:

[(1, 21453033), (3, 7151011), (7, 3064719), (19, 1129107), (21, 1021573), (49, 437817), (57, 376369), (133, 161301), (147, 145939), (399, 53767), (931, 23043), (2793, 7681)]