21666573

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{827}}^1$

素因数の和:945

約数の個数: 24

約数和(自身を含む): 32550336

約数和(自身を除く): 10883763

約数列:

[1, 3, 9, 41, 71, 123, 213, 369, 639, 827, 2481, 2911, 7443, 8733, 26199, 33907, 58717, 101721, 176151, 305163, 528453, 2407397, 7222191, 21666573]

約数ペア:

[(1, 21666573), (3, 7222191), (9, 2407397), (41, 528453), (71, 305163), (123, 176151), (213, 101721), (369, 58717), (639, 33907), (827, 26199), (2481, 8733), (2911, 7443)]