855765

素因数分解:

$3^4\times 5^1\times {\mathrm{2113}}^1$

素因数の和:2130

約数の個数: 20

約数和(自身を含む): 1534764

約数和(自身を除く): 678999

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 2113, 6339, 10565, 19017, 31695, 57051, 95085, 171153, 285255, 855765]

約数ペア:

[(1, 855765), (3, 285255), (5, 171153), (9, 95085), (15, 57051), (27, 31695), (45, 19017), (81, 10565), (135, 6339), (405, 2113)]