21286143

素因数分解:

$3^2\times {\mathrm{73}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:439

約数の個数: 24

約数和(自身を含む): 31515120

約数和(自身を除く): 10228977

約数列:

[1, 3, 9, 73, 179, 181, 219, 537, 543, 657, 1611, 1629, 13067, 13213, 32399, 39201, 39639, 97197, 117603, 118917, 291591, 2365127, 7095381, 21286143]

約数ペア:

[(1, 21286143), (3, 7095381), (9, 2365127), (73, 291591), (179, 118917), (181, 117603), (219, 97197), (537, 39639), (543, 39201), (657, 32399), (1611, 13213), (1629, 13067)]