19903891

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^2\times {\mathrm{67}}^1$

素因数の和:179

約数の個数: 24

約数和(自身を含む): 24493056

約数和(自身を除く): 4589165

約数列:

[1, 7, 31, 37, 67, 217, 259, 469, 1147, 1369, 2077, 2479, 8029, 9583, 14539, 17353, 42439, 76849, 91723, 297073, 537943, 642061, 2843413, 19903891]

約数ペア:

[(1, 19903891), (7, 2843413), (31, 642061), (37, 537943), (67, 297073), (217, 91723), (259, 76849), (469, 42439), (1147, 17353), (1369, 14539), (2077, 9583), (2479, 8029)]