21012561

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{45779}}^1$

素因数の和:45805

約数の個数: 16

約数和(自身を含む): 32961600

約数和(自身を除く): 11949039

約数列:

[1, 3, 9, 17, 27, 51, 153, 459, 45779, 137337, 412011, 778243, 1236033, 2334729, 7004187, 21012561]

約数ペア:

[(1, 21012561), (3, 7004187), (9, 2334729), (17, 1236033), (27, 778243), (51, 412011), (153, 137337), (459, 45779)]