20871657

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 31000320

約数和(自身を除く): 10128663

約数列:

[1, 3, 9, 71, 89, 213, 267, 367, 639, 801, 1101, 3303, 6319, 18957, 26057, 32663, 56871, 78171, 97989, 234513, 293967, 2319073, 6957219, 20871657]

約数ペア:

[(1, 20871657), (3, 6957219), (9, 2319073), (71, 293967), (89, 234513), (213, 97989), (267, 78171), (367, 56871), (639, 32663), (801, 26057), (1101, 18957), (3303, 6319)]