20291421

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{7507}}^1$

素因数の和:7580

約数の個数: 16

約数和(自身を含む): 29191104

約数和(自身を除く): 8899683

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 7507, 22521, 127619, 382857, 397871, 1193613, 6763807, 20291421]

約数ペア:

[(1, 20291421), (3, 6763807), (17, 1193613), (51, 397871), (53, 382857), (159, 127619), (901, 22521), (2703, 7507)]