21521619

素因数分解:

$3^4\times 7^1\times {\mathrm{37957}}^1$

素因数の和:37976

約数の個数: 20

約数和(自身を含む): 36743344

約数和(自身を除く): 15221725

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37957, 113871, 265699, 341613, 797097, 1024839, 2391291, 3074517, 7173873, 21521619]

約数ペア:

[(1, 21521619), (3, 7173873), (7, 3074517), (9, 2391291), (21, 1024839), (27, 797097), (63, 341613), (81, 265699), (189, 113871), (567, 37957)]