19990412

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{12401}}^1$

素因数の和:12449

約数の個数: 24

約数和(自身を含む): 38892672

約数和(自身を除く): 18902260

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 403, 806, 1612, 12401, 24802, 49604, 161213, 322426, 384431, 644852, 768862, 1537724, 4997603, 9995206, 19990412]

約数ペア:

[(1, 19990412), (2, 9995206), (4, 4997603), (13, 1537724), (26, 768862), (31, 644852), (52, 384431), (62, 322426), (124, 161213), (403, 49604), (806, 24802), (1612, 12401)]