19997131

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{7019}}^1$

素因数の和:7074

約数の個数: 16

約数和(自身を含む): 25608960

約数和(自身を除く): 5611829

約数列:

[1, 7, 11, 37, 77, 259, 407, 2849, 7019, 49133, 77209, 259703, 540463, 1817921, 2856733, 19997131]

約数ペア:

[(1, 19997131), (7, 2856733), (11, 1817921), (37, 540463), (77, 259703), (259, 77209), (407, 49133), (2849, 7019)]