19992501

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4657}}^1$

素因数の和:4722

約数の個数: 20

約数和(自身を含む): 30435372

約数和(自身を除く): 10442871

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4657, 13971, 41913, 125739, 246821, 377217, 740463, 2221389, 6664167, 19992501]

約数ペア:

[(1, 19992501), (3, 6664167), (9, 2221389), (27, 740463), (53, 377217), (81, 246821), (159, 125739), (477, 41913), (1431, 13971), (4293, 4657)]