21017493

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{2239}}^1$

素因数の和:2401

約数の個数: 24

約数和(自身を含む): 34944000

約数和(自身を除く): 13926507

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 2239, 3129, 6717, 9387, 15673, 20151, 47019, 141057, 333611, 1000833, 2335277, 3002499, 7005831, 21017493]

約数ペア:

[(1, 21017493), (3, 7005831), (7, 3002499), (9, 2335277), (21, 1000833), (63, 333611), (149, 141057), (447, 47019), (1043, 20151), (1341, 15673), (2239, 9387), (3129, 6717)]