19878663

素因数分解:

$3^1\times 7^2\times {\mathrm{271}}^1\times {\mathrm{499}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 31008000

約数和(自身を除く): 11129337

約数列:

[1, 3, 7, 21, 49, 147, 271, 499, 813, 1497, 1897, 3493, 5691, 10479, 13279, 24451, 39837, 73353, 135229, 405687, 946603, 2839809, 6626221, 19878663]

約数ペア:

[(1, 19878663), (3, 6626221), (7, 2839809), (21, 946603), (49, 405687), (147, 135229), (271, 73353), (499, 39837), (813, 24451), (1497, 13279), (1897, 10479), (3493, 5691)]