20518281

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{4861}}^1$

素因数の和:4941

約数の個数: 24

約数和(自身を含む): 34384064

約数和(自身を除く): 13865783

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 4861, 14583, 34027, 43749, 102081, 306243, 325687, 977061, 2279809, 2931183, 6839427, 20518281]

約数ペア:

[(1, 20518281), (3, 6839427), (7, 2931183), (9, 2279809), (21, 977061), (63, 325687), (67, 306243), (201, 102081), (469, 43749), (603, 34027), (1407, 14583), (4221, 4861)]