21012993

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{40961}}^1$

素因数の和:40989

約数の個数: 16

約数和(自身を含む): 32769600

約数和(自身を除く): 11756607

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 40961, 122883, 368649, 778259, 1105947, 2334777, 7004331, 21012993]

約数ペア:

[(1, 21012993), (3, 7004331), (9, 2334777), (19, 1105947), (27, 778259), (57, 368649), (171, 122883), (513, 40961)]