19954991

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2749}}^1$

素因数の和:2834

約数の個数: 16

約数和(自身を含む): 24552000

約数和(自身を除く): 4597009

約数列:

[1, 7, 17, 61, 119, 427, 1037, 2749, 7259, 19243, 46733, 167689, 327131, 1173823, 2850713, 19954991]

約数ペア:

[(1, 19954991), (7, 2850713), (17, 1173823), (61, 327131), (119, 167689), (427, 46733), (1037, 19243), (2749, 7259)]