21210759

素因数分解:

$3^2\times {\mathrm{53}}^2\times {\mathrm{839}}^1$

素因数の和:951

約数の個数: 18

約数和(自身を含む): 31263960

約数和(自身を除く): 10053201

約数列:

[1, 3, 9, 53, 159, 477, 839, 2517, 2809, 7551, 8427, 25281, 44467, 133401, 400203, 2356751, 7070253, 21210759]

約数ペア:

[(1, 21210759), (3, 7070253), (9, 2356751), (53, 400203), (159, 133401), (477, 44467), (839, 25281), (2517, 8427), (2809, 7551)]