21206241

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{823}}^1$

素因数の和:1245

約数の個数: 24

約数和(自身を含む): 35135360

約数和(自身を除く): 13929119

約数列:

[1, 3, 7, 9, 21, 63, 409, 823, 1227, 2469, 2863, 3681, 5761, 7407, 8589, 17283, 25767, 51849, 336607, 1009821, 2356249, 3029463, 7068747, 21206241]

約数ペア:

[(1, 21206241), (3, 7068747), (7, 3029463), (9, 2356249), (21, 1009821), (63, 336607), (409, 51849), (823, 25767), (1227, 17283), (2469, 8589), (2863, 7407), (3681, 5761)]