21125943

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{691}}^1$

素因数の和:819

約数の個数: 24

約数和(自身を含む): 31665920

約数和(自身を除く): 10539977

約数列:

[1, 3, 9, 43, 79, 129, 237, 387, 691, 711, 2073, 3397, 6219, 10191, 29713, 30573, 54589, 89139, 163767, 267417, 491301, 2347327, 7041981, 21125943]

約数ペア:

[(1, 21125943), (3, 7041981), (9, 2347327), (43, 491301), (79, 267417), (129, 163767), (237, 89139), (387, 54589), (691, 30573), (711, 29713), (2073, 10191), (3397, 6219)]