21396231

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8521}}^1$

素因数の和:8564

約数の個数: 20

約数和(自身を含む): 32997184

約数和(自身を除く): 11600953

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8521, 25563, 76689, 230067, 264151, 690201, 792453, 2377359, 7132077, 21396231]

約数ペア:

[(1, 21396231), (3, 7132077), (9, 2377359), (27, 792453), (31, 690201), (81, 264151), (93, 230067), (279, 76689), (837, 25563), (2511, 8521)]