21538629

素因数分解:

$3^4\times 7^1\times {\mathrm{37987}}^1$

素因数の和:38006

約数の個数: 20

約数和(自身を含む): 36772384

約数和(自身を除く): 15233755

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37987, 113961, 265909, 341883, 797727, 1025649, 2393181, 3076947, 7179543, 21538629]

約数ペア:

[(1, 21538629), (3, 7179543), (7, 3076947), (9, 2393181), (21, 1025649), (27, 797727), (63, 341883), (81, 265909), (189, 113961), (567, 37987)]