21163705

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{409}}^1$

素因数の和:624

約数の個数: 16

約数和(自身を含む): 25977600

約数和(自身を除く): 4813895

約数列:

[1, 5, 79, 131, 395, 409, 655, 2045, 10349, 32311, 51745, 53579, 161555, 267895, 4232741, 21163705]

約数ペア:

[(1, 21163705), (5, 4232741), (79, 267895), (131, 161555), (395, 53579), (409, 51745), (655, 32311), (2045, 10349)]