21320205

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{34667}}^1$

素因数の和:34716

約数の個数: 16

約数和(自身を含む): 34945344

約数和(自身を除く): 13625139

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 34667, 104001, 173335, 520005, 1421347, 4264041, 7106735, 21320205]

約数ペア:

[(1, 21320205), (3, 7106735), (5, 4264041), (15, 1421347), (41, 520005), (123, 173335), (205, 104001), (615, 34667)]