19871439

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{6907}}^1$

素因数の和:7054

約数の個数: 16

約数和(自身を含む): 30505728

約数和(自身を除く): 10634289

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 6907, 20721, 48349, 145047, 946259, 2838777, 6623813, 19871439]

約数ペア:

[(1, 19871439), (3, 6623813), (7, 2838777), (21, 946259), (137, 145047), (411, 48349), (959, 20721), (2877, 6907)]