21289569

素因数分解:

$3^1\times 7^2\times {\mathrm{251}}^1\times {\mathrm{577}}^1$

素因数の和:845

約数の個数: 24

約数和(自身を含む): 33209568

約数和(自身を除く): 11919999

約数列:

[1, 3, 7, 21, 49, 147, 251, 577, 753, 1731, 1757, 4039, 5271, 12117, 12299, 28273, 36897, 84819, 144827, 434481, 1013789, 3041367, 7096523, 21289569]

約数ペア:

[(1, 21289569), (3, 7096523), (7, 3041367), (21, 1013789), (49, 434481), (147, 144827), (251, 84819), (577, 36897), (753, 28273), (1731, 12299), (1757, 12117), (4039, 5271)]