21237531

素因数分解:

$3^1\times 7^3\times {\mathrm{20639}}^1$

素因数の和:20663

約数の個数: 16

約数和(自身を含む): 33024000

約数和(自身を除く): 11786469

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 20639, 61917, 144473, 433419, 1011311, 3033933, 7079177, 21237531]

約数ペア:

[(1, 21237531), (3, 7079177), (7, 3033933), (21, 1011311), (49, 433419), (147, 144473), (343, 61917), (1029, 20639)]