21789971

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2579}}^1$

素因数の和:2674

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 4959469

約数列:

[1, 7, 17, 71, 119, 497, 1207, 2579, 8449, 18053, 43843, 183109, 306901, 1281763, 3112853, 21789971]

約数ペア:

[(1, 21789971), (7, 3112853), (17, 1281763), (71, 306901), (119, 183109), (497, 43843), (1207, 18053), (2579, 8449)]