21639125

素因数分解:

$5^3\times {\mathrm{331}}^1\times {\mathrm{523}}^1$

素因数の和:869

約数の個数: 16

約数和(自身を含む): 27139008

約数和(自身を除く): 5499883

約数列:

[1, 5, 25, 125, 331, 523, 1655, 2615, 8275, 13075, 41375, 65375, 173113, 865565, 4327825, 21639125]

約数ペア:

[(1, 21639125), (5, 4327825), (25, 865565), (125, 173113), (331, 65375), (523, 41375), (1655, 13075), (2615, 8275)]