21727845

素因数分解:

$3^7\times 5^1\times {\mathrm{1987}}^1$

素因数の和:2013

約数の個数: 32

約数和(自身を含む): 39123840

約数和(自身を除く): 17395995

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 1987, 2187, 3645, 5961, 9935, 10935, 17883, 29805, 53649, 89415, 160947, 268245, 482841, 804735, 1448523, 2414205, 4345569, 7242615, 21727845]

約数ペア:

[(1, 21727845), (3, 7242615), (5, 4345569), (9, 2414205), (15, 1448523), (27, 804735), (45, 482841), (81, 268245), (135, 160947), (243, 89415), (405, 53649), (729, 29805), (1215, 17883), (1987, 10935), (2187, 9935), (3645, 5961)]