21328191

素因数分解:

$3^4\times {\mathrm{73}}^1\times {\mathrm{3607}}^1$

素因数の和:3692

約数の個数: 20

約数和(自身を含む): 32306032

約数和(自身を除く): 10977841

約数列:

[1, 3, 9, 27, 73, 81, 219, 657, 1971, 3607, 5913, 10821, 32463, 97389, 263311, 292167, 789933, 2369799, 7109397, 21328191]

約数ペア:

[(1, 21328191), (3, 7109397), (9, 2369799), (27, 789933), (73, 292167), (81, 263311), (219, 97389), (657, 32463), (1971, 10821), (3607, 5913)]