1991731

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:258

約数の個数: 16

約数和(自身を含む): 2419200

約数和(自身を除く): 427469

約数列:

[1, 7, 23, 89, 139, 161, 623, 973, 2047, 3197, 12371, 14329, 22379, 86597, 284533, 1991731]

約数ペア:

[(1, 1991731), (7, 284533), (23, 86597), (89, 22379), (139, 14329), (161, 12371), (623, 3197), (973, 2047)]