18400221

素因数分解:

$3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{3011}}^1$

素因数の和:3121

約数の個数: 24

約数和(自身を含む): 30698304

約数和(自身を除く): 12298083

約数列:

[1, 3, 7, 9, 21, 63, 97, 291, 679, 873, 2037, 3011, 6111, 9033, 21077, 27099, 63231, 189693, 292067, 876201, 2044469, 2628603, 6133407, 18400221]

約数ペア:

[(1, 18400221), (3, 6133407), (7, 2628603), (9, 2044469), (21, 876201), (63, 292067), (97, 189693), (291, 63231), (679, 27099), (873, 21077), (2037, 9033), (3011, 6111)]