1639845

素因数分解:

$3^4\times 5^1\times {\mathrm{4049}}^1$

素因数の和:4066

約数の個数: 20

約数和(自身を含む): 2940300

約数和(自身を除く): 1300455

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4049, 12147, 20245, 36441, 60735, 109323, 182205, 327969, 546615, 1639845]

約数ペア:

[(1, 1639845), (3, 546615), (5, 327969), (9, 182205), (15, 109323), (27, 60735), (45, 36441), (81, 20245), (135, 12147), (405, 4049)]