19749709

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{241}}^1\times {\mathrm{509}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 23696640

約数和(自身を除く): 3946931

約数列:

[1, 7, 23, 161, 241, 509, 1687, 3563, 5543, 11707, 38801, 81949, 122669, 858683, 2821387, 19749709]

約数ペア:

[(1, 19749709), (7, 2821387), (23, 858683), (161, 122669), (241, 81949), (509, 38801), (1687, 11707), (3563, 5543)]