19998139

素因数分解:

$7^1\times {\mathrm{29}}^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:187

約数の個数: 24

約数和(自身を含む): 24527360

約数和(自身を除く): 4529221

約数列:

[1, 7, 29, 43, 79, 203, 301, 553, 841, 1247, 2291, 3397, 5887, 8729, 16037, 23779, 36163, 66439, 98513, 253141, 465073, 689591, 2856877, 19998139]

約数ペア:

[(1, 19998139), (7, 2856877), (29, 689591), (43, 465073), (79, 253141), (203, 98513), (301, 66439), (553, 36163), (841, 23779), (1247, 16037), (2291, 8729), (3397, 5887)]