19989389

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{367}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 23740416

約数和(自身を除く): 3751027

約数列:

[1, 7, 31, 217, 251, 367, 1757, 2569, 7781, 11377, 54467, 79639, 92117, 644819, 2855627, 19989389]

約数ペア:

[(1, 19989389), (7, 2855627), (31, 644819), (217, 92117), (251, 79639), (367, 54467), (1757, 11377), (2569, 7781)]