21456555

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20147}}^1$

素因数の和:20226

約数の個数: 16

約数和(自身を含む): 34815744

約数和(自身を除く): 13359189

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 20147, 60441, 100735, 302205, 1430437, 4291311, 7152185, 21456555]

約数ペア:

[(1, 21456555), (3, 7152185), (5, 4291311), (15, 1430437), (71, 302205), (213, 100735), (355, 60441), (1065, 20147)]