170505

素因数分解:

$3^4\times 5^1\times {\mathrm{421}}^1$

素因数の和:438

約数の個数: 20

約数和(自身を含む): 306372

約数和(自身を除く): 135867

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 421, 1263, 2105, 3789, 6315, 11367, 18945, 34101, 56835, 170505]

約数ペア:

[(1, 170505), (3, 56835), (5, 34101), (9, 18945), (15, 11367), (27, 6315), (45, 3789), (81, 2105), (135, 1263), (405, 421)]